Longevity medicine should be good medicine.

A Stanford-trained internist writing about prevention, symptoms, labs, and the places longevity medicine gets ahead of itself.

Know your biological age.

Not a wellness quiz. A structured assessment — sleep, exercise, labs, metabolic markers, and functional tests — that estimates where your body is relative to your calendar age.

Calendar age

42

biological age

37

Example: sleep, exercise, and metabolic markers align to shave ~5 years

Good medicine first.

Longevity can get weird fast. The filter: evidence, safety, follow-through, and a plan to stop when an intervention is not earning its keep.

Know what you are measuring

A lab matters when it changes the decision, not because it makes the dashboard look complete.

Match biology to biography

Risk, symptoms, hormones, sleep, medications, stress, and goals belong in one clinical story.

Retest, edit, stop

Every intervention needs a reason, a check-in, and a way out if it is not helping real life.

Hillary Lin, MD standing in a dark blazer

Medicine, then systems.

Hillary trained at Stanford and Columbia, then built companies around the same problem: how to turn medical evidence into decisions people can actually use.

Clinical training

Stanford biology and medicine, Columbia oncology training.

Company building

Built a VC-backed mental health company and learned where protocols break when real patients are on the other side.

CareCore

Guardrails for longevity care: physician review, documentation, and stop rules.

Building in longevity care?

CareCore is clinical infrastructure for safe, accountable longevity medicine — physician oversight, documentation, and monetization rails for creators and clinicians.

Physician oversight

Review protocols, catch contraindications, and keep care within guardrails that protect both patients and creators.

Creator monetization

Monetization rails that don't require selling unreviewed supplements or making promises you can't back up clinically.

Stop rules

Built-in documentation and off-ramps. When an intervention isn't earning its keep, there's a clean path to pivot.

The Letter is where I do the thinking in public.

Prevention, labs, symptoms, and healthspan, written for people who want signal without the miracle language.

For health topics that attract bad slogans.

Longevity science, women's health, clinical AI, and the care models that need more medicine than marketing.

Speaking and partnerships