Hillary Lin, MD

A health tracker inside your bra sounds a little ridiculous.

Then you remember where a bra sits.

I like Petal's chest-based heart sensing much more than I trust its visceral-fat estimate. If that number is going to guide decisions, show me the MRI or CT comparison and the error range.

Still, women's health needs more weird, daring hardware.

Would you wear it?

petal.today/products/petal

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1 day ago | [YT] | 4

Hillary Lin, MD

Should you test your biological age?
Before you pay, how much can you trust the result?

Imagine your next report says you're three years “younger.” What would you want that to mean: lower disease risk, better physical function, a longer life?

A change in the score alone doesn't establish those benefits. That's the question I'd want answered before using it to judge whether a treatment worked.

I'll discuss questions like this at MVMNT, September 22–23 in Coronado.

For clinicians joining us: JOINME10 gives you 10% off registration.
theemvmnt.com/?utm_source=speaker&utm_medium=socia…

4 days ago | [YT] | 4

Hillary Lin, MD

Bloating is not always a gas problem. Sometimes it is a movement problem.

With abdominophrenic dyssynergia, or APD, the diaphragm moves down while the front abdominal wall relaxes. That can shift abdominal contents forward even when gas volume changes little.

The mechanism is real. But there's no solid diagnostic criteria, and the evidence comes from small studies.

Swipe for what researchers saw, the 66% biofeedback signal, and the better question to ask.

Before this, had you heard of APD?

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5 days ago | [YT] | 20

Hillary Lin, MD

Fiber is not one thing.

Psyllium, beta-glucan, inulin, resistant starch, bran, lentils, and berries all count. They do not do the same job.

Some form gels. Some hold water. Some ferment fast. Some add bulk. More grams can help, or leave you with more gas and pressure.

Swipe, then ask: what result am I asking this fiber to produce?

Full guide:

hillarylinmd.com/guides/fiber-constipation-bloatin…

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1 week ago | [YT] | 35

Hillary Lin, MD

What part of longevity medicine is real, and what is just expensive fear?

My line is simple: advanced is not the same as useful. If a test will not change a decision, it may be data. It is not care.

Swipe for the framework I use:

QUESTION -> THRESHOLD -> ACTION -> OWNER -> REASSESS

What part of longevity feels like medicine to you, and what feels like marketing?

I'm discussing this at MVMNT in Coronado, September 22 and 23:

theemvmnt.com/

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2 weeks ago | [YT] | 17

Hillary Lin, MD

Can your face predict how long you'll live?

A study of 1,826 older twins found that each year someone looked older was linked to an 8% higher rate of death during follow-up. After researchers added grip strength, physical function, and cognition, that fell to 3%.

The face may reflect parts of health important to lifespan.

Do you think you can tell a person's health from their face?

I'll unpack this at the Science of Skin Longevity Summit, September 17 to 20:

scienceofskinsummit.com/

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2 weeks ago | [YT] | 10

Hillary Lin, MD

Two people can have the same BMI and very different metabolic futures.

BMI tells you size. It doesn't tell you fat distribution, liver fat, muscle mass, cardiorespiratory fitness, glucose handling, lipid pattern, or blood pressure.

Visceral fat — the fat packed deep in the abdomen around your organs, not the fat you can pinch — drains toward the liver. That's why it tracks with triglycerides, fatty liver, insulin resistance, and blood pressure in a way subcutaneous fat generally doesn't.

A new Circulation follow-up of two MRI-based lifestyle trials followed participants 5 and 10 years out. Weight came back completely. But some abdominal fat-depot improvements partially persisted — and each 10% of lifestyle-induced visceral fat loss was independently associated with a 28% lower risk of developing type 2 diabetes.

Association, not guaranteed protection. And this is not an MRI-for-everyone message.

But it does reframe the target. The goal isn't a smaller body. It's a safer metabolic topology: less risky storage, better glucose, lipid and blood pressure physiology, preserved muscle, better fitness, and a plan you can sustain.

The scale is the wrong main character.

Next: how to track visceral-fat risk without becoming an MRI hobbyist.

Klein et al., Circulation 2026. PMID 42227111

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1 month ago | [YT] | 35

Hillary Lin, MD

Statins have somehow become a culture-war drug.

That is the wrong frame. The decision should be about absolute cardiovascular risk, likely benefit from LDL/apoB lowering, and individual tradeoffs: side effects, diabetes risk, pregnancy plans, interactions, cost, and monitoring.

Would you want a longer video on how I think through the statin decision?

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2 months ago | [YT] | 48

Hillary Lin, MD

Is the biggest longevity drug almost here?

Retatrutide is not FDA-approved, and it has not been shown to extend lifespan.

But the reason this category matters is bigger than weight loss. GLP-1/GIP/glucagon drugs are starting to touch the risk stack that shortens modern lives: visceral fat, glucose, BP, sleep apnea, kidney and cardiovascular risk, inflammation-adjacent markers, and mobility.

So here is the real question: what should count as a “longevity drug”?

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2 months ago | [YT] | 33

Hillary Lin, MD

Quick nutrition check: do you think of juice as fruit?

I don’t think sugar is the enemy. But sugar removed from the structure that slows it down behaves differently. Whole fruit comes with fiber, chewing, water, volume, and satiety. Juice is much easier to overdo.

Would you rather see a longer video on fruit, juice, blood pressure, and metabolic health?

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2 months ago | [YT] | 38