TLDR Certain flavonoids help grow back colored hair after skin injury.
The study from 2019 found that flavonoids with two hydroxyl groups in the B-ring, specifically sterubin, luteolin, and hydroxygenkwanin, effectively promoted the regeneration of black pigmented hair in mice after skin wounding. Flavonoids with only one OH group in the B-ring were not effective. The study suggests that the chemical structure of flavonoids is crucial for their ability to induce pigmented hair regeneration following skin injury. The experiments included a control group of 44 mice and treatment groups with 17 to 21 mice each.
7 citations,
January 2018 in “Journal of Tissue Viability” An 80-year-old patient grew new hair on a wound, showing that elderly people can still regenerate hair.
16 citations,
July 2016 in “Journal of Dermatological Science” Regenerated hairs can regain their color if the wound occurs during a certain stage of hair growth, and this process is helped by specific skin cells and proteins.
59 citations,
April 2016 in “Cell Reports” EdnrB signaling helps melanocyte stem cells regenerate and could be targeted to treat pigmentation issues.
260 citations,
June 2011 in “Cell” Wnt signaling is crucial for pigmented hair regeneration by controlling stem cell activation and differentiation.
829 citations,
May 2007 in “Nature” Hair follicles can regrow in wounded adult mouse skin using a process like embryo development.
April 2023 in “Journal of Investigative Dermatology” Blocking casein kinase 1 in skin cells can help melanocyte precursors move better, potentially helping with conditions like vitiligo or gray hair.
240 citations,
April 2011 in “Pigment Cell & Melanoma Research” Melanocyte stem cells in hair follicles are key for hair color and could help treat greying and pigment disorders.
10 citations,
November 2010 in “Pigment Cell & Melanoma Research” Only skin melanocytes, not other types, can color hair in mice.
75 citations,
January 2009 in “International journal of trichology” Hair grays due to oxidative stress and fewer functioning melanocytes.