Do Keratin Products Actually Repair Damaged Hair? What the Evidence Says
Keratin products can make damaged hair look and behave better. Rebuilding the fiber is a different problem.
A journal on the biology of hair
The Hairtellectual
Biology-first thinking about hair, scalp, and the science of longevity - for the hair-literate.
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The science, written for readers.
Female Pattern Hair Loss Can Start in Your 20s or Around Menopause
Early-onset and late-onset female pattern hair loss are distinct conditions, not two chapters of the same story.
How Caffeine, Rosemary, Rice Bran and Tyrosine Impact Hair Follicles
What the research actually shows for five common haircare ingredients - including two that reach into color.
Research
Peer-reviewed papers authored by our team.
Sept4/ARTS regulates stem cell apoptosis and skin regeneration
Fuchs Y, Brown S, Gorenc T, Rodriguez J, Fuchs E, Steller H
Science · 2013 · 341(6143):286–289
Read the paperARTS mediates apoptosis and regeneration of the intestinal stem cell niche
Koren E, Yosefzon Y, Ankawa R, Soteriou D, Jacob A, Nevelsky A, Ben-Yosef R, Bar-Sela G, Fuchs Y
Nature Communications · 2018 · 9:4582
Read the paperMore
More from the journal.
Oxidative Stress, or How a Hard Year Can Change Your Hair Color
How cortisol and oxidative stress damage pigment cells across three layers of the follicle - and what is recoverable.
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.
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.
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