Hillary Lin, MD

Hillary Lin, MD Stanford-trained physician focused on evidence-based longevity medicine: labs, medications, prevention, risk, and what the science actually supports.

Founder of CareCore. Host of The Longevity Show. I'm Dr. Hillary Lin, a Stanford-trained internal medicine physician and longevity clinician. I use this page to make longevity medicine more rigorous and less hype-driven: what labs can and cannot tell you, when medications or supplements make sense, how to think about prevention, and where the evidence is thin. For clinic support: [email protected]. For CareCore: [email protected]. CareCore builds clinically governed protocol infrastructure for evidence-based care and health products. This page is Hillary Lin, MD, so the center of gravity here is physician judgment, science translation, and practical prevention — not miracle claims or one-size-fits-all optimization.

08/26/2026

VO₂ max can be excellent—and still miss a huge part of fitness.

It measures how your oxygen-delivery system performs under stress. It does not measure strength or grip, both of which matter enormously for staying capable as we age.

The longevity mistake is turning one excellent number into the entire scoreboard.

Train your engine. Keep your muscle.

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

08/19/2026

You can have a good VO₂ max and still have no aerobic base.

That was Brooks’ surprise after years of CrossFit. Peak capacity and the ability to sustain easier work for a long time are related—but not the same.

His answer wasn’t to quit CrossFit. It was to add longer rows and bike sessions to fill the gap.

“Fit” isn’t one thing.

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

08/18/2026

"Zone 2" is not one universal number.

There are multiple zone systems, anchored to different thresholds and measured—or guessed—in different ways.

Zone 2 can be useful. But copying someone else's heart-rate target without knowing the system behind it is false precision.

Before you chase the number, ask: Which system? Based on what test? For what adaptation?

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

08/18/2026

I may have hacked my VO₂ max test with pure Type A fear 😅

I told the lab I wasn't a runner. Then I kept going much longer than anyone expected—not because I found a hidden cardiovascular superpower, but because I really, really did not want to fail.

A maximal test measures physiology. It also measures what effort you can produce that day.

Gold standard doesn't mean context-free.

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

08/14/2026

Training for an Ironman is not the same as training your VO₂ max.

An Ironman can take 9–14 hours. A VO₂ max test takes about 8–12 minutes. One rewards sustained output; the other asks how hard your aerobic system can go near its ceiling.

Both are fitness. Different events, different adaptations.

Train for the capacity you actually want.

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

08/12/2026

Everyone wants the Blue Zones food secret. Maybe it was the stairs.

Bread. Wine. Olive oil. Beans. Fine. But have you seen the stairs in old Italian cities?

Maybe some of the "secret" is movement so built into daily life that nobody has to call it exercise.

This is not proof of causation, and Blue Zones claims deserve skepticism. But the built environment quietly decides how much your body moves all day.

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

08/10/2026

You don't have to become elite. You have to stay capable longer.

The longevity fitness goal may not be the highest peak. It may be the longest plateau.

If you keep training while many peers slowly stop, you can become exceptional for your age without ever having been a pro.

Build reserve now. Protect it later.

The win isn't never aging. It's declining more slowly.

Full episode with Brooks Leitner of VO Health: https://www.youtube.com/watch?v=KahsHPVzVs4

“Non-toxic” is not a material — it’s a marketing word.If you’re choosing cookware, start with the surface touching your ...
06/10/2026

“Non-toxic” is not a material — it’s a marketing word.

If you’re choosing cookware, start with the surface touching your food, not the cleanest-sounding label.

This carousel breaks down PFOA-free vs PFAS-free vs PTFE-free, ceramic, and titanium claims, plus when I’d replace a worn nonstick pan.

Full guide: https://hillarylinmd.com/guides/safe-nonstick-cookware

The Enhanced Games were pitched as a cleaner version of a messy reality: let the drugs be visible, supervise them medica...
06/02/2026

The Enhanced Games were pitched as a cleaner version of a messy reality: let the drugs be visible, supervise them medically, and measure what happens.

That part is interesting.

But the results did not give us the simple story people wanted.

One swimmer went faster than the official 50m freestyle record, but the mark was unofficial: drug-permitted event, banned suit tech, not ratified like a normal world record. Most records did not fall. Several reported non-enhanced athletes still won.

That does not mean steroids are fake. Testosterone, growth hormone, stimulants, EPO, and other performance drugs can change real physiology: muscle, recovery, arousal, oxygen-carrying capacity, training tolerance.

But sport is not a blood test. A race result also depends on talent, event fit, training history, timing, injury risk, nerves, equipment, and side effects.

This is the longevity lesson too: a better lab number is not automatically a better health outcome. Faster recovery is not automatically better long-term function. Medical supervision is not the same as proof of safety.

Wrong question: do these drugs work? Some do. Better question: what outcome are we trying to improve — and what tradeoff are we accepting to get there?

Follow for longevity medicine without hype.

Sources: Enhanced ASCEND001/ClinicalTrials.gov, BBC/AFP, World Aquatics, NBC/ABC reporting, and selected PubMed anchors.

05/29/2026

The 1% Longevity Rule:

150 minutes of exercise per week sounds like one more impossible thing.

But 150 minutes is about 1% of your week.

That does not mean everyone’s schedule is easy. It means the question gets more useful.

Where can the 1% go?

A walk between meetings. A short strength session. Exercise snacks. A few protected blocks across the week.

Then the mix matters: strength training, low/moderate aerobic work, a little higher-intensity work if you are ready for it, and enough recovery to actually adapt.

For longevity, the goal is not the hardest possible week.
It is a training rhythm you can repeat.

From my conversation with Kyle Gonzalez on The Longevity Show (link in bio).

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