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Prologue Labs
A journal on the biology of hair

The Hairtellectual

Field Notes

Oxidative Stress, or How a Hard Year Can Change Your Hair Color

Can stress contribute to gray hair? Explore how oxidative stress and nerve signals can affect the cells responsible for hair pigment—and what research suggests about whether some hairs can regain their color.

3 min read·Prologue Research Team

Field Notes

Going Gray Early? The Biologic Explanation

Whether younger generations gray earlier is hard to prove, but graying responds to conditions around the follicle, and several have shifted.

4 min read·Prologue Research Team

Field Notes

Sleep, Gut Health and Your Hair Color

Pigment cells run on a circadian clock and respond to the body's conditions, how sleep and the gut set the stage for color.

3 min read·Prologue Research Team