210 citations,
May 2006 in “The FASEB journal” Oxidative stress causes hair to gray by damaging and killing pigment cells.
7 citations,
September 2004 in “International Journal of Cosmetic Science” Blond hair lightens more with visible light directly, while ultraviolet light lightens it after washing by damaging other hair parts.
152 citations,
December 2003 in “Micron” As people age, their hair follicles produce less pigment, leading to gray and white hair, due to factors like reduced enzyme activity and damage to melanocyte DNA.
3 citations,
December 2003 in “Micron” The book "Hair Science and Technology" provides a deep understanding of hair biology and genetics, discusses hair growth, density, and diseases, and offers methods for managing hair loss and caring for hair growth.
86 citations,
August 2000 in “Pigment cell research” Melanocyte activity in hair follicles is linked to the hair growth cycle, being active in growth phases and inactive in rest phases.
130 citations,
December 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair follicle melanocytes die during hair regression.
161 citations,
June 1994 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair stops producing melanin as it transitions from the growth phase to the resting phase.
18 citations,
January 1994 in “Skin pharmacology and physiology” Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.
