Subscribe to The Longevity Letter

The longevity research your doctor should be reading. Weekly, by Dr. Hillary Lin, MD.

LATEST POSTS

Your sleep score is lying to you

Your sleep score is lying to you

Hillary Lin, MD

Apr 22, 2026

The NIH tested 8 longevity supplements this year. All 8 failed.

The NIH tested 8 longevity supplements this year. All 8 failed.

Hillary Lin, MD

Apr 15, 2026

Peptides get the hype. These amino acids get the results.

Peptides get the hype. These amino acids get the results.

Hillary Lin, MD

Apr 8, 2026

Your Supplement Might Contain Viagra, Lead, or Poison

Your Supplement Might Contain Viagra, Lead, or Poison

Hillary Lin, MD

Mar 31, 2026