Vault Sleep OS: Hormones

By Kat Fu, M.S., M.S. ~ 20 years in health optimization

Wake with the energy you had 10 years ago—so you can do the things you love.


3am or early wakeups? A 5-6 hour ceiling—even with good sleep hygiene? This self-paced solution targets hormone changes after 50 so you can finally rebuild continuous 7–8 hours sleep, restore morning clarity, and protect brain health.

No prescriptions
Unlimited access
Instant digital access

150-220+

Peer-reviewed references in each hormone (estrogen, progesterone, testosterone)

20,000+

Longevity Vault community members & subscribers

5

Science domains integrated: Unique multidisciplinary approach

AFTER DOING EVERYTHING FOR SLEEP HYGIENE.

Are You Still Exhausted From Years of 5-Hour Sleep?—Here’s Why & What You Can Do

I’m Kat Fu—and I know what you’re going through. For > 15 years, my sleep looked like yours:

Unable to stay asleep. Mornings that started behind. Even with careful habits—I still stared at the ceiling, counting sheep.

If that sounds familiar, this probably describes your sleep:

Waking between 2–4 am

—sudden alertness or racing thoughts without clear triggers

Drifting in & out of restless sleep

—without deeper, recovery phases

Early wake-ups (4–5 am)

— need to pee or unexplained alertness

Nighttime warmth or sweating

—even in a cool room

Meanwhile, your days still demand sharp thinking, stable mood, and dependable energy—and it gets harder to trust you’ll have them when you need them.

For midlife physiology
For advanced age physiology
No new prescriptions

Sleep Hygiene Alone Doesn’t Resolve 3am Wakeups

Most sleep advice focuses on falling asleep.

But not being able to stay asleep (or fall back asleep) is a different challenge.

Reproductive hormones buffer stress.

When hormone function is under-supported, the same stress load can drive a stronger stress response and push the brain into wakefulness at 2–4 a.m and sleep breaks down into the patterns you may be experiencing: light, fragmented, and unrefreshing—even when yoga, breathing work, and sleep hygiene are in place.

When hormone function is optimized & supported, here’s what changes:

You stop treating 3 am wakeups as an automatic part of aging
You restore more continuous sleep—especially across the 2–4 a.m. window
You wake with the cognitive sharpness for complex work, reading & social presence

Testosterone

More robust circadian rhythm → less early-night stress reactivity and optimized anabolic recovery

Estrogen

Smoother nighttime temperature → fewer awakenings and steadier REM transitions

Progesterone

Calmer GABA tone and steadier breathing → deeper, unbroken sleep

With the core problem identified, here’s what typical solutions miss—and how Sleep OS Hormones helps you:

Targets STAYING asleep, not just falling asleep

Gain predictability in your sleep.

Solve the core problem (3am wakeups), not the wrong one — so that you don’t have to dread going to bed, wondering if “tonight will be a bad one,” and can instead rely on a consistent ability to rest.

Close-up of hand stopping alarm clock, representing root cause analysis of sleep problems with Sleep OS tactical recovery system.
Two blood sample vials used for inflammation blood test and chronic inflammation blood test analysis. These tests help measure inflammation blood markers to assess overall health and longevity. Kat Recommends tracking these markers for proactive health optimization.

address hormone function, not just hormone levels

Improve sleep even when your labs look “fine” or you’re already on TRT/HRT.

Address the root cause so that you can improve your sleep without reopening the HRT debate with your doctor, yourself (or your partner)—and without feeling like you have to choose between “natural” and “effective.”

10-19 modifiable factors per hormone beyond age you can still change

Stop feeling like midlife sleep loss is something you simply have to accept.

Work on the hormone-related factors & disruptors that remain in your control — so you can stop wondering “is this just what my 50s/60s/70s feel like now?” and instead see exactly which factors are still under your control—and work on those first, with a concrete plan.

longevity vault blueprint to overcome health overwhelm
pexels googledeepmind 17483868 scaled

No prescriptions required

Sleep naturally without becoming dependent on a pill to function.

Maintain autonomy over your sleep & health—without adding new treatments to juggle, more side-effect monitoring, or extra health admin to your day.

Metabolic

Quality sleep improves blood sugar control

Enjoy steadier daytime energy & better cardiometabolic health.

Brain health

Slow-wave sleep clears Alzheimer’s-related proteins

Improve memory, focus, and protect brain health.

Aging

Continuous sleep slows biological aging

Enjoy “younger-feeling” days—with better stamina and recovery.

By improving sleep continuity & sleep architecture, Sleep OS helps you slow aging, protect brain health, and improve cardiometabolic health.

“I found Kat and The Longevity Vault eight months ago and finally felt like someone was explaining hormones and sleep beyond what’s normally out there. When Sleep OS: Hormones launched, I bought it immediately. It’s well-organized, easy to follow, and truly step-by-step. It respects the complexity without making it feel overwhelming.”

—Mandy T., finance executive and mother, Sleep OS: Hormones – Duo

stop treating sleep in isolation

And finally address the full interconnected system—from your biology to your environment—that affects whether you stay asleep or wake up wired at 3 a.m.

150-220+ peer-reviewed references per hormone

So that you feel safe and confident applying these tools, knowing this is a rigorous, evidence-backed system, not another fleeting wellness trend.

5 science disciplines integrated

So that you can move beyond standard advice and apply a sophisticated, multi-layered strategy that actually matches the complexity of your adult physiology and changing hormonal landscape (Sleep science, chronobiology, (epi)genetics, biomechanics, engineering)

Structured 60-day path with phased daily steps

So that you can replace the overwhelm of conflicting health advice with a clear, navigable roadmap that respects your time while giving your biology the time it requires to adapt through a physiologically coherent sequence that builds on each prior step.

30-day fast-track option

So that your plan is personalized from the start, with a 30-day track that adapts to your baseline sleep, life constraints, and current season of life — without sacrificing the scientific depth required for sleep recovery.

(If you prefer 1:1 mentorship from Kat, learn more & apply here)

Improve sleep in the comfort of your own home, on your schedule
Self-paced, no calls or memberships

I am so impressed with the material that I got after signing up for this. Thanks for everything.

—Tim R., psychologist, Sleep OS: Hormones – Trio

Who Is Sleep OS Hormones for?

Sleep OS: Hormones is for adults who have tried sleep hygiene but still wake in the middle of the night, waking up too early or unable to get enough sleep or refreshing sleep.

It is built to work whether you’re on TRT/HRT, considering it, or trying to avoid it.

Adults 50+

★ Men experiencing lighter, less consolidated sleep
★ Women with hot flashes, night sweats, or fragmented sleep
★ Men and women with more frequent needs to pee at night (nocturia) since midlife
★ Men and women with age-related changes across all 3 hormones
★ Men and women with higher stress reactivity compared with earlier decades

Women 40–50 in Transition

★ Often experience progesterone-related “wired but tired” patterns
★ Can experience more nighttime bathroom trips than before
★ May notice changes in sleep stability before menopause

Adults of Any Age Under Stress or High Physical Activity

★ High-stress professionals with suppressed hormone signaling
★ Athletes or highly active individuals with high recovery demands
★ Adults on restrictive diets or with chronically low energy intake that reduce hormone resilience
★ Adults whose stress response stays elevated into the evening with more difficulty switching off

Special Cases at Any Age


★ Women with PCOS or estrogen/progesterone imbalance
★ Men with elevated estrogen or low testosterone
★ Adults with metabolic conditions — including central adiposity (excess abdominal fat), that disrupt hormone function & signaling

Your 60-Day Path to More Energy, Better Mood & More Brain-Protective Sleep

00

Orientation (7 or 14 days)

Learn how each hormone interacts with circadian timing and sleep stages. Establish baseline patterns and plan your 60‑day sequence.

01

Phase 1: Build the foundation (Days 1–20)

Reinforce the body’s capacity to produce hormones consistently. Begin to observe how energy and sleep respond.

02

Phase 2: Reinforce & Balance (Days 21–40)

Support carrying, conversion, and balance. See whether clearance or stress suppression influence nighttime patterns.

03

Phase 3: Protect & Consolidate (Days 41–60)

Identify and address hormone function disruptors and reinforce earlier work to strengthen the hormonal foundation for sleep.

04

More energy for the parts of life you enjoy

Enjoy more daytime energy & fewer crashes. That capacity can go toward hobbies, family & the fun activities that were hard to enjoy when you were tired..

What You Get – For Each Hormone (Testosterone as the Example)

Start improving 3 a.m. wakeups now—without waiting on labs or prescriptions.

Testosterone–sleep architecture foundation

— Mechanisms connecting testosterone to circadian timing, stress buffering, growth hormone, and energy balance—so you see the full scope of how it shapes sleep and recovery, and recognize how many influential factors you can still control at any age.

Your susceptibility profile (10+ hormone disruption factors beyond age)

— Who is most susceptible & identify which factors are driving disruption in your specific case

Pattern recognition guide

— How testosterone-related sleep disruption shows up

What your testosterone function needs

— Across production, transport, receptor sensitivity, and clearance (from 170+ peer-reviewed studies.)

Sleep, stress & energy recovery suite (60-day implementation sequence):

★ Days 1–20: Testosterone production support (step-by-step, 5 phases)
★ Days 21–40: Testosterone transport, receptor sensitivity, and clearance (step-by-step, 5 phases)
★ Days 41-60: Hormone disruptors audit & guided plan to identify and reduce external disruptors of hormone function that work against testosterone regulation and sleep (step-by-step, 3 phase)

Sleep OS hormones Testosterone Function & Sleep Atlas
Sleep OS Hormones Testosterone–Sleep, Stress & Energy Recovery Suite & Advanced Toolkit

Keep Your Brain Young, Healthy — And Your Body Recovered: Why This Matters Beyond Feeling Rested

Deep, continuous sleep is when your brain clears amyloid and other metabolic waste through the glymphatic system.

Fragmented sleep and 3 am wakeups— even if you’re “getting hours” — interrupt that process. Over years, that’s not just fatigue. It’s accelerated cognitive aging.

Not another get morning sunlight checklist.
Limited-Time Bonuses

Bonus tools that make your path personalized from day one.

Hormone–Sleep Pattern & Pathway Navigator

Your susceptibility profile, pattern assessment, and implementation calendar—mapped to your situation

— Know which path you need, how to sequence it, and when to revisit—based on your patterns, not a generic starting point

Personalized path selection and sequencing—so you know exactly where to start and what order to follow

Integrated Hormone Labs & Interpretation Suite (Advanced toolkit)

Beyond testosterone and estrogen levels—the broader markers that complete the picture

— for when you want data: shows which standard and advanced tests to run, where to get them, how to understand them, and what those multi-marker patterns mean for sleep

See the full landscape of hormone-related markers—not just the narrow panel your doctor defaults to, so you don’t spend time and money on markers that won’t change your decisions… and end up overlooking the ones that will.

Advanced Hormone Modulation & Supplement Strategy Matrix (Advanced toolkit)

Evidence-rated by function—so you select based on your biology

— supplement options organized by function (production, cofactors, receptor sensitivity, metabolism and clearance)

Know what each compound targets and whether the evidence supports it—so you’re not investing in things that don’t address your situation

“I wish I’d known there were ways to support hormone function without medication ten years ago.”

— Mandy T. , Sleep OS: Hormones – Duo

Whether you’re firmly anti-HRT, cautiously exploring it, or already years into a prescription…


Sleep OS gives you a path that meets you where you are instead of asking you to change course first—no conflict & no starting over—so that you wake up with the cognitive sharpness to handle complex work, enjoy reading, and stay fully present with your friends & loved ones—without the fear of “brain fog” or decline.

✓ = Yes | ~ = Partial | ✗ = No

The Sleep OS Hormones Solution Replaces

Many individuals solving 3 am wake ups or other mid-life & advanced age sleep issues through conventional routes invest some version of the following over 12–18 months:

$400–1,200 in functional medicine consultations just to understand your case and discuss options—helpful context, but no reusable, step-by-step hormone–sleep plan you can run on your own.
$400–1,500 in specialized hormone panels—often repeated—plus interpretation fee. You get level snapshots with no insight into hormone function, and no actionable path for changing 3 a.m. wakeups or a 5–6 hour ceiling.
$600–1,800/year in rotating sleep and hormone supplements. Stacks that help some nights but not others, with ongoing guess-and-check and no unifying framework explaining why any one compound fits your pattern.
480+ hours synthesizing research to understand how to address it

“I have benefited so much so far ….. The program is so well put together and a great value for the price.

—Tim R., Sleep OS: Hormones – Trio

Find Your Sleep OS Hormones Sleep Recovery Path—avoid treating 3 aM wakeups as an automatic part of aging.

Lengthen your sleep, protect your daytime focus & independence

Each Sleep OS Hormone sleep recovery solution combines deep educational foundations with structured implementation plans to help you stay asleep and to restore quality sleep.

50+ | Men &
50+ | Women

Post-menopausal / andropausal flattening

For women and men 50+ with 3 am wakeups, short sleep, higher stress reactivity and slower anabolic recovery in men.

Metabolic Issues | Men & Women

Insulin resistance / PCOS / central weight

For metabolic challenges or androgen-metabolic overlap—that is shortening sleep or driving a stronger stress response at night.

40–50 | Women

Hormonal transition & stress-linked variability

For lighter or unpredictable sleep—night warmth, anxious restlessness, or high workload stress—benefit from E+P stabilization.

Sleep & Stress Foundation

Not sure where to start?

This is the the ideal starting point if you are unsure which path to choose or want to begin with the essentials.

Are You Looking To Work Directly With Kat?

Testosterone, Estrogen + Progesterone

Sleep OS hormones Trio Testosterone, Estrogen + Progesterone

Adults ages 50+

With difficulty staying asleep or higher stress reactivity

Individuals of any age

Metabolic dysfunction, insulin resistance with lighter sleep

Men of any age

With central fat distribution

Women of any age

With PCOS

sleep os trio

Finally Sleep 7+ Continuous Hours — With Minimum Daytime Sleepiness:

$697

Reduce 2–4 a.m. awakenings
Strengthen recovery (anabolic recovery in men)
Unlimited access
Personalized pacing
Instant access
Unlimited updates
TRT compatible
sleep os duo

add meaningful sleep time
—by Targeting Modifiable Factors

$497

Ease night warmth and mid-sleep wakeups
Support deeper phases and staying asleep
Unlimited access
Personalized pacing
220+ references for estrogen, 150+ for progesterone
HRT compatible

Estrogen + Progesterone

SLeep OS homones DUO 2 e1767874133180

Women ages 40-50

In perimenopause or menopause experiencing sleep disruption

Women ages 40-50

Experiencing psychosocial or career stress

Women 30-40

High activity / training load, restrictive eating patterns

Women 30-40

Experiencing psychosocial or career stress

sleep os single: testosterone, estrogen or progesterone

Enjoy your relationships again—less irritability from chronic exhaustion, less reactivity to daily stress.

Single Hormone Stress & Sleep Foundational Solutions to support a better mood—so you’re less on edge and more patient

$277

Testosterone

For men with low morning vitality, fragmented sleep, or reduced recovery.

Support morning energy, focus, and post-stress recovery
Improve sleep depth and continuity through better anabolic recovery
170+ peer-reviewed references covering testosterone’s role in stress buffering, anabolic recovery, sleep consolidation, and deep sleep architecture
Ongoing reference as sleep patterns evolve

$277

Estrogen

For women with estrogen-related sleep disruption including night sweats or early-morning wake-ups

Support smoother REM transitions — so nights feel deeper, not longer.
Reduce night sweats and early-morning awakenings through improved thermoregulation
220+ peer-reviewed references covering estrogen’s role in thermoregulation, REM sleep transitions, and circadian rhythm
Ongoing reference as sleep patterns evolve
Support GABA tone and reduce mid-night alertness
Strengthen nightly stress resilience for more restorative rest
150+ peer-reviewed references covering progesterone’s role in GABA modulation, deep sleep maintenance, and HPA axis regulation
Ongoing reference as sleep patterns evolve

break the expensive, exhausting cycle of starting from scratch with new providers every few years

Instead, invest in a foundational system that adapts to your physiology as you age.

Evergreen / reusable when life changes

So that you retain the autonomy to self-correct immediately when life throws a curveball—like a stressful quarter or international travel—without needing to wait weeks for an appointment to “fix” your sleep again.

Self-Paced, no appointments, calls or memberships

Sleep OS bends to fit your life—not the other way around—so you can integrate the adjustments seamlessly into your routine without the added stress of “making time” for yet another recurring commitment—in the comfort & privacy of your own home

Unlimited access & updates

You own the materials and any future updates-so you are securing a lifelong longevity asset that sits permanently in your toolkit, rather than renting a solution that disappears the moment you stop paying a monthly subscription or coaching fee.

Instant digital access

A clutter-free, searchable digital asset that you can access from any device, so you have a “living encyclopedia” of sleep science that is impossible to lose, damage, or leave behind while traveling.

So 3am stops being a daily appointment with your ceiling—and becomes just another hour you sleep through.
Instead, invest in a foundational system that adapts to your physiology as you age. Man in his 50s walking on rocky forest trail above a mountain lake, calm and alert

The Energy to Do All Sorts of Fun Activities — a Brain That Stays Sharp

When sleep improves, the benefits show up in what you can do with your days. For many adults in their 50s, 60s, and 70s, the return is being able to enjoy a show or read in the evening and still wake clear-headed, enjoy gardening or a hike without a mid-morning or afternoon crash, follow interesting work or creative projects without feeling mentally thin, and have the energy and presence to enjoy music, travel, or time with family & friends.

Sleep OS: Hormones helps you you stay asleep—so more of your remaining years feel like this baseline, not the exception.

Have normal labs or…

On TRT/HRT? Many Sleep OS members are.

Having hormones available (whether its from TRT/HRT or normal labs) is not the same as your body using them effectively.

That’s why you can have normal labs or be on TRT/HRT and still wake at 3am.

Sleep OS: Hormones helps you support hormone levels AND how your body actually uses those hormones to support sleep through supporting and improving:

HGP signaling (how your brain send instructions to your ovaries/testes so hormones are produced and released)
Hormone production dynamics (does your body have what it needs to make the hormones?)
Hormone transport (how hormones are carried in your blood from where they are made to the brain and other tissues that use them for sleep)
Hormone use & sensitivity (how effectively your cells can use the hormone once it reaches target tissue)
Hormone clearance (hormones are not “more is better”; they have to be metabolized and cleared. When this is not working well, you get prolonged hormone exposure and to its active metabolites—some of which, like DHT from testosterone or certain estrogen metabolites, can be stronger than the parent hormone and distort the body’s intended signaling, including around sleep.
Become the CEO of your sleep

Robust sleep—The sleep that fits an enjoyable life.

I know what it feels like to be told by the medical establishment that poor sleep is “just aging”—a narrative that treats decline, fatigue, and brain fog as things you should accept with grace, as though wanting better makes you difficult. I know the frustration of the “it’s just stress” brush-off: a catch-all explanation that explains nothing and offers no path forward.

So you turn to the wellness industry—and it hands you blackout shades, a cooling mattress, the promise that the latest technology will finally unlock the sleep you’re missing.

When that doesn’t work either, you do what any health-conscious person would do: you shrink your life to protect your sleep. No late dinners. No screens before bed. No carbs—and still, you wake up too early, alert and irritated.

That’s not health. That’s quality of life traded away in the name of optimization.

The wellness industry sold us gadgets. The medical establishment gave us labels. And underneath it all is the message you’re left with: that your body is a mystery you cannot understand. It keeps you in a cycle of outsourcing—waiting for someone else to connect the dots. And, it lands you in the same place every time: confusion, dependency, and zero ownership of your own health.

I didn’t accept that. And you don’t have to either.

So I built Sleep OS to empower you with what you can do to support your physiology—without needing someone else to interpret your body for you.

My multidisciplinary background—plus 15 years of living this problem—allowed me to see what most approaches miss: that hormones, circadian biology and stress capacity work as one interconnected network—not isolated problems with isolated fixes.

Sleep OS is a 60-day path that makes sense of the complexity without requiring you to become a researcher yourself—so you can stop improvising and start following a coherent plan that addresses the right drivers, in the right order, so progress becomes predictable.

What this makes possible is something most approaches never offer: the ability to become the CEO of your own physiology..

Kat Fu Transparent BG


To understand what’s driving your 3 a.m. wakeups—and address it without appointments, without waiting lists, without outsourcing your health to someone who sees you for 15 minutes twice a year.

And beyond that—robust sleep.

Sleep that doesn’t require a perfect routine. Sleep that can withstand the occasional indulgence. Sleep that fits an enjoyable life.

Members are staying asleep longer, sleeping more continuously, and falling back asleep when they wake—because they now have a framework that matches the actual complexity of what’s happening in their bodies.

You shouldn’t have to accept 3 a.m. wakeups as the “new normal.”

With Sleep OS, you can build the opposite: sleep you can count on.

Become the CEO of your sleep. Build sleep you can count on.

You shouldn’t have to accept 3 a.m. wakeups as the new normal—with Sleep OS Trio, you won’t.

One investment.
Full autonomy.
No appointments.

FAQ

What if this is just aging and there’s nothing I can do about it?

Aging does make sleep more vulnerable, but it is not the same as “nothing can change.” As people move through their 40s, 50s, 60s, and beyond, the biology that supports continuous sleep needs more support and becomes easier to disturb.

Sleep OS: Hormones is for this life stage. It helps you strengthen what is still modifiable: hormone production and clearance, how sensitive your body is to those hormones. The goal is to reduce avoidable fragmentation (like 3 a.m. wake-ups and 5–6 hour caps) and move you toward a more stable, repeatable sleep baseline for these decades of your life, even with the realities of aging.

Is it just stress?

The same workload or life load you handled in your 30s can start affecting your sleep in your 40s and 50s because your capacity to absorb that stress has changed.

When stress buffering is strong, stressors can coexist and you stay asleep. When buffering is weakened, stress wins, and sleep fragments even when your habits are solid.

Sleep OS: Hormones is not a stress-management course; it assumes stress is part of real life. It is a solution to help you build & support your stress capacity so your physiology can handle the stress load without 2–4 a.m. wakefulness.

Do I need lab testing to use the frameworks to make progress?

No. The Sleep OS Hormone Systems are designed to re-establish the biological stages that govern hormone function without requiring testing.

This structure benefits individuals across a wide range of hormone levels and life stages, including those who have not had a recent hormonal lab test.

If you prefer deeper precision, the optional Advanced Toolkit Add-On ($97 value) includes both standard hormone panels and advanced markers used in clinical and functional labs. It’s ideal for individuals who want to correlate lab data with the protocol stages or who already work with a healthcare provider. This toolkit is included as a bonus during the limited Charter Access stage.

Do I need to make additional purchases to use the frameworks to make progress?

No. Each Hormone System is self-guided and self-contained. You can complete every step on your own time without memberships, coaching, or scheduled calls.

All materials—frameworks, assessments, and progression plans—are included with your purchase. You’re not locked into a subscription or dependent on external input to make measurable progress. The hormone optimization for sleep improvement process is structured for independent implementation, with tools that adapt to your own circumstance.

Do I need supplements to make progress with Sleep OS sleep solutions?

No. The Sleep OS Hormone Solutions do not rely on supplements to create progress.

However, the bonus Advanced Toolkit, provides curated advanced supplement frameworks for individuals who have completed the main program and wish to explore additional optimization. These are not required for success. They serve as advanced insights—specific to each hormone system.

Will this help if I wake up 1–3 times a night to pee?

Yes. Testosterone and estrogen influence how your kidneys handle water and produce urine at night, and those signals often change from midlife onward. Sleep OS: Hormones helps you support those hormonal patterns so the need to pee at night is (nocturia) less disruptive to falling back asleep and staying asleep, even when bladder or prostate checks are fine.

Does Sleep OS help with sleep apnea?

Sleep OS does not diagnose, treat, or cure sleep apnea. Obstructive sleep apnea is typically an airway problem that needs clinical testing and device- or procedure-based care. If you suspect sleep apnea, the first step is assessment by a sleep specialist or your healthcare provider.

However, sleep apnea rarely exists in isolation. Studies show that many individuals with sleep apnea also have overlapping hormonal and circadian factors. Some individuals also report residual daytime sleepiness despite good CPAP compliance. This is where Sleep OS can help. While CPAP addresses the airway obstruction, your hormones can still be disrupted independently. These are the same systems that affect anyone’s sleep—whether they have apnea or not.

Sleep OS works on these underlying hormonal factors that determine sleep quality regardless of anatomical issues. If you’re receiving proper care for sleep apnea but still experiencing fragmented sleep or daytime fatigue, Sleep OS may help optimize the additional factors affecting your sleep.

For anyone with diagnosed or suspected sleep apnea, Sleep OS works as a complement to—not a replacement for—appropriate medical care.

What exactly is the Advanced Toolkit?

The Advanced Toolkit extends each Hormone Solution for individuals who want to add precision testing and targeted interventions after completing the main program. It includes:

  • Standard testing guidance—which labs to order or request from your provider, and when each marker might be useful
  • Advanced testing options beyond standard hormone panels, explaining when and why they might help
  • Supplement frameworks for each hormone, compounds that support specific steps in hormone function
  • Distinct toolkits for each hormone—Estrogen, Progesterone, and Testosterone

Nothing in the Advanced Toolkit is required to make progress. It exists for those who want advanced precision work.

How long until I notice improvement?

The pace of change varies. Hormone and sleep systems recalibrate gradually, and the timeline depends on how long patterns have been disrupted, which pathways require the most support, and how consistently implementation is maintained.

Some individuals observe early changes—such as steadier temperature regulation or fewer 2–4 a.m. awakenings—within several weeks. For others, progress develops across multiple months as hormone signaling and downstream functions normalize.

Rather than expecting a fixed timeline, the framework highlights measurable indicators—greater energy steadiness, smoother morning alertness, and fewer night awakenings—as signs that recovery processes are beginning to stabilize.

Is this medical advice or treatment?

This is educational content and implementation tools, not medical advice or treatment. Sleep OS teaches you how biological systems work and provides frameworks for optimization—it doesn’t diagnose or treat medical conditions. If you have diagnosed sleep disorders or medical conditions, you can use this system alongside your medical treatment, not instead of it. If you are under medical care for medical conditions, always consult healthcare providers for medical decisions or lifestyle changes.

How is this different from hormone replacement therapy (HRT)?

This framework addresses the functional foundation that supports natural hormone production, signaling, and clearance. It’s not a replacement for medical hormone therapy when indicated, but rather an approach to supporting your body’s intended hormone function.

Some individuals find that establishing this foundation reduces or changes their relationship to medical options. Others use these protocols alongside HRT to ensure their bodies can properly utilize supplemented hormones.

I’m taking hormone replacement already. Will this still help?

Yes. Even when taking exogenous hormones, your body still requires functional support for hormone transport, receptor function, and metabolism. These protocols ensure you’re getting benefit from hormone replacement by addressing the downstream mechanisms that determine how hormones work at the tissue level.

How deeply researched are these protocols?

Each Sleep OS Hormone System draws on an extensive scientific foundation. The Estrogen System integrates insights from more than 220 peer-reviewed studies, the Testosterone System from 170 +, and the Progesterone System from 150 +.

This depth allows each protocol to address the full biochemical sequence—how hormones are produced, transported, converted, and cleared—rather than focusing on isolated symptoms.While typical coaching or short-form programs can only skim these topics, Sleep OS organizes years of research into a structured framework that individuals can apply at their own pace.

The result is not just more information, but a clearer map of what to prioritize, in what order, and why it matters for sleep stability.

How is Sleep OS delivered? Do I get immediate access?

Sleep OS is delivered as a digital system in Notion with immediate web access after purchase. It’s self-paced so you can improve your sleep on your own timeline—no waiting for appointments or working around someone else’s schedule.

Everything is done-for-you: structured protocols, step-by-step guides, decision trees, assessment frameworks, and implementation tools. Think of it as how I would coach someone through sleep recovery, but compressed into a digital system you can access anytime.

After purchase, you’ll receive a Starter Hub that shows you how to navigate the framework and how to sequence your implementation.

You get education + implementation so you understand the why behind every strategy and how to adapt approaches as your sleep improves. If you prefer to skip the educational layers, there are direct-access tools and protocols, though the system works best when you understand the underlying mechanisms.

How much time does implementation require?

The sleep improvement strategies are designed for gradual integration over 60 days per hormone.

There is also a compressed 30-day implementation option. The Hormone–Sleep Pattern & Pathway Navigator helps you decide whether to follow the standard 60-day sequence or the 30-day path, based on your sleep pattern and your preferences, so you can choose a pace that fits your situation.

Most members have active professional lives and hobbies and spend about 1–2 hours per week with the material during the first 15–21 days, either in 2–3 sittings or in short 15–20 minute blocks across 4–5 days, to evaluate where they are and plan the next 5–10 days of their sleep recovery

The first 7–14 days serve as an orientation phase focused on learning the educational material that forms the foundation for implementation.

Because the framework is organized by biological function, each phase builds sequentially—addressing one layer at a time rather than introducing everything at once.

Is there ongoing support or community access?

The framework is designed to be fully self-guided, with comprehensive written protocols that don’t require ongoing support to implement.

Is this only for women?

No. While some hormonal sleep mechanisms differ between men and women, all three hormone pathways (estrogen, testosterone, progesterone) affect sleep in both sexes.

Each workbook includes population-specific guidance where mechanisms differ.

Stop investing in hormone panels that don’t change any decisions—and build a leaner supplement plan that is anchored in evidence-rated essentials

Integrated Hormone Labs & Interpretation Suite

Full landscape of hormone-related markers, not just the narrow panel your doctor defaults to—so you don’t keep spending time and money on labs that won’t change your decisions and overlook the markers that will.

Advanced Hormone Modulation & Supplement Strategy Matrix

An evidence-informed supplement matrix, so that you can feel confident about what to invest in and what to drop without relying on memory or gut feeling alone—and have the peace of mind that your supplement choices are aligned with the latest data.

Your structured path to sleep you can count on—not something you negotiate with every night.

—Begin with the Sleep OS: Hormones Trio.

Unlike coaching that ends, you own this solution. Use it now, revisit during life changes, return after stressful periods.

One investment, unlimited utility.

Cross-disciplinary (5 domains)
Evergreen
Personalized
Sleep OS Hormones Trio

“You have truly become my primary source for thinking about health.” —Tim R., Trio

Age Better & feel younger, together—making better sleep your shared longevity project as a couple

The Hormone Trio was designed to provide full coverage across all three hormone systems—because each one influences sleep in different ways.
While it’s structured for individuals, we know that sleep challenges often appear in households where both partners are at a similar life stage.

In Kat’s experience working with adults in mid- and later life, one of the biggest barriers to progress is when only one partner is following a new approach while the other’s routine stays unchanged. She’s long wished for a way couples could move through a program together.

That’s why we invite you to share the Trio with your partner. One can follow the estrogen or progesterone path, the other the testosterone path—each with their own 60-day sequence, yet progressing side by side in the same system.
It’s a way to make sleep recovery & optimization a shared longevity project—supporting your individual biology while improving rest for both of you.

Multi-Disciplinary Approach: 5 Science Domains Integrated

Ready to Sleep 7-8 Continuous Hours and Wake With Energy?

If you did the same hormone–sleep mapping and implementation plan through 1:1 consults, you’d be looking at 3–10 visits plus follow-ups—often $1,400–$4,500+ for a single hormone-focused workup, not including your time.

Sleep OS: Hormones Trio gives you the 60-day path, your susceptibility profile, the pattern navigator, and the advanced tools across testosterone, estrogen, and progesterone for $697, with ongoing access.

This means, you can return to the framework whenever your sleep or life situation changes instead of starting a new round of appointments.

Sleep OS Hormones Testosterone–Sleep, Stress & Energy Recovery Suite & Advanced Toolkit
Instant digital access
Solve for staying asleep
Sleep naturally

What Readers Value in Kat Fu’s Work

I appreciate the rigor and clarity. Your work is careful, sourced, and useful.

— Subscriber

A pleasure to read, and I’ve learned a lot about sleep

— Reader

A living encyclopedia of health. Thorough, reliable, and generous.

— Subscriber

The most thoroughly documented health writing I follow.

— Subscriber

You always pack so much into everything you write, and I really love that. You’re also so giving in your responses.

— Subscriber

You have truly become my primary source for thinking about health.

— Subscriber

⭐ Work 1:1 With Kat: Sleep Recovery Programs

For adults whose sleep remains disrupted even with good habits—especially if you suspect multiple contributing factors beyond just one issue and want personalized clarity on your specific pattern.

These programs accelerate your progress to sleep recovery by turning your notes, history, and current obstacles into prioritized next steps tailored to your sleep pattern.

$4,500

Sleep OS Signature

1:1 Sleep Recovery Concierge Access

(Application-Only)

Everything in SLEEP OS Clarity
Kat’s assessment of what is causing your sleep issue
Address stress, metabolic, hormonal circadian & other drivers as needed
Done-together for 90 days with checkpoints & priority replies—save time, fewer dead-ends, personalized course-correction as you progress
Accelerate your path to sleep recovery so you can protect long-term brain health and daytime performance

$1,797

Sleep OS ClaritY

1:1 Sleep Clarity Mentorship

3 asynchronous 1:1 mentorship sessions
Receive guidance in a structured written reply (1 core topic per session)
Use each session for what you need most — questions, pattern interpretation, or next-step direction
Get clarity on what is (are) causing your sleep issues so you know what to focus on first
Includes the Complete Sleep OS Trio Hormone (in adults 40+, the hormonal layer is almost always involved)

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