TLDR Tooth loss can cause premature gray hair due to less chewing.
This study investigated the effect of reduced mastication on premature hair graying by extracting maxillary first molars from young mice and observing them for 3 months. The results showed that gray hair appeared in the interbrow region of the tooth extraction group but not in the control group. Additionally, the expression of tyrosinase-related protein-2 (TRP-2) mRNA was lower in the interbrow tissues of mice without maxillary molars. The findings suggested that tooth loss leads to interbrow gray hair growth, possibly due to weakened trigeminal nerve input, indicating that reduced mastication causes premature graying. Prompt prosthetic treatment after molar loss was recommended.
1 citations
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November 2022 in “International journal of trichology” A woman's premature gray hair turned mostly black again after using Greyverse solution and hair supplements for 5 months.
2 citations
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March 2020 in “Developmental cell” Stress can cause hair to turn gray by depleting pigment-producing cells through the release of a stress hormone.
260 citations
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January 2020 in “Nature” Stress can cause hair to turn gray by depleting stem cells.
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February 2019 in “International Journal of Dermatology” Gray hair is caused by reduced melanin production or transfer issues, linked to aging and possibly health conditions, with treatments focusing on color camouflage.
46 citations
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December 2014 in “Journal of The American Academy of Dermatology” Premature hair graying in young men is linked to family history, obesity, and smoking.
688 citations
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June 2007 in “Cell Stem Cell” Removing the ATR gene in adult mice causes rapid aging and stem cell loss.