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June 2004 in “Biophysical Journal” Hard α-keratin in hair has a unique, nonordered structure, different from other fibers.
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July 2011 in “PLOS ONE” Spermidine may help reduce hair loss and deserves further testing as a treatment.
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January 2015 in “Indian Journal of Dermatology, Venereology and Leprology” Vitamin D is important for skin health and can help treat psoriasis, atopic dermatitis, and vitiligo.
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January 2022 in “International Journal of Molecular Sciences” Melatonin, a hormone, can help protect skin from aging by reducing stress, inflammation, and damage, and may also help treat hair loss in women.
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March 2014 in “International Journal of Molecular Sciences” Testosterone reduces knee flexibility by affecting relaxin receptors.
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January 2020 in “The World Journal of Men's Health” Long-term use of finasteride and dutasteride can cause serious health issues like diabetes and liver problems.
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April 2000 in “Journal of Investigative Dermatology” The AVET system effectively delivers genes to human keratinocytes and may help treat skin diseases.
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Periplaneta americana extract promotes hair growth and is safe for treating hair loss.