Kat Fu, M.S., M.S.

“My LDL-C is 186—I eat whole foods & exercise: what else is left to do?”

Accelerated Aging Risks /

An LDL-C of 186 and ApoB of 128 in someone eating whole foods, exercising regularly, and carrying roughly 10% body fat raises a question that goes beyond food quality: what is keeping particle levels this high, and what is the smartest next step? Cardiovascular risk accumulates over time. Autopsy-based research from the Pathobiological Determinants of […]

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The first question I ask every client about their sleep

Sleep & 3AM Wakeups /

Feeling rested on waking is not a loose impression of sleep quality—it is a measure of whether overnight recovery completed. A large U.S. study of 5,268 adults age 50+ found that those who woke without feeling rested had approximately 6% shorter telomeres compared to the cohort average, independent of age, chronic disease, body weight, and

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Is sleeping < 7 hours really worse for biological aging?

Sleep & 3AM Wakeups /

A study of 434 participants from the Whitehall II cohort found that shorter sleep duration was associated with shorter leukocyte telomere length — a marker of biological aging. Telomeres were on average 6% shorter in those sleeping fewer than 5 hours compared with those sleeping more than 7 hours per night. Telomeres are protective DNA

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Do 3am wakeups speed up your epigenetic age?

Sleep & 3AM Wakeups /

Epigenetic clocks measure how fast cells are aging at a molecular level—and multiple human cohort studies now link poor sleep to measurable acceleration on these clocks. Sleep fragmentation, frequent nighttime awakenings, and poor sleep quality all track with older DNA methylation ages and shorter telomeres in midlife and older adults. The more encouraging finding is

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Why Melatonin Often Don’t Deliver (& 5 Safe Adjustments for Better Sleep)

Supplements & Medications /

Melatonin supports sleep within a specific physiological window—your internal biological night. When taken outside that window, it can reinforce the wrong circadian phase rather than supporting continuity, contributing to fragmented sleep and 3 a.m. awakenings. Whether melatonin is even relevant to your sleep depends on your individual melatonin profile, not on the supplement formulation or

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My 6-Step System To Detect (& Reverse) Early Aging from Routine Labs (SPIRAL)

Longevity Strategy /

Meaningful health decline often unfolds within normal lab ranges, years before a doctor would flag anything. The Vault SPIRAL method is a 6-step framework for reading routine bloodwork as a moving picture of your aging trajectory rather than a static snapshot. Standard lab interpretation misses early decline because results are presented without longitudinal trends, baseline

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The Real Reason Our Doctors Can’t Flag Early Aging & Decline

Longevity Strategy /

Lab reference ranges are designed to catch established disease—not to flag the early biological shifts that matter most for longevity. When results fall within the “normal” range, no follow-up is triggered, even when values have drifted meaningfully from a person’s own baseline. Population thresholds vs. individual trajectories: Current lab ranges prioritize identifying pathology like diabetes

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Kidney stones: Is avoiding spinach enough?

Accelerated Aging Risks /

Avoiding spinach addresses only the dietary fraction of total oxalate load—roughly 20–50% in typical mixed diets. Approximately 50–80% of urinary oxalate is produced inside the body through liver-based metabolic pathways, independent of what you eat. A 2024 longitudinal study following over 426,000 generally healthy adults found a dose-response relationship between 24-hour urinary oxalate excretion and

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Does “deep sleep” clear Alzheimer’s proteins? New human data (Oct 2025) shows “time in deep sleep” predicted 0% of amyloid removal—here’s what does:

Sleep & 3AM Wakeups /

Each night, a waste clearance process removes neurotoxic proteins—amyloid-β and tau—from the brain via the glymphatic network, a cerebrospinal fluid-based mechanism formally described in 2012. October 2025 human data (Dagum et al.) from researchers at Stanford and the University of Washington School of Medicine found that time spent in deep sleep (N2/N3) predicted 0% of

Does “deep sleep” clear Alzheimer’s proteins? New human data (Oct 2025) shows “time in deep sleep” predicted 0% of amyloid removal—here’s what does: Read Post »

The CEO’s Nighttime Peeing Problem—A Case Study: Why ‘No Water After 7PM’ Fails

Sleep & 3AM Wakeups /

Waking to urinate multiple times at night is often framed as a bladder or hydration problem—but nocturia is primarily an ADH and sleep problem. ADH (antidiuretic hormone, also called vasopressin) should rise during sleep to concentrate urine and slow kidney filtration; when sex hormone changes or sleep fragmentation disrupt this rise, the kidneys continue producing

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