January 2004 in “Giornale di Metafisica: revista bimestrale di filosofia” Increased Wnt signaling causes hair graying by depleting melanocyte stem cells in aged mice.
January 2026 in “Figshare” Finasteride can cause melasma, especially in people with darker skin.
Red light exposure slows aging in mice by improving fat metabolism.
January 2023 in “Journal of applied animal research” Short photoperiods improve cashmere growth and quality in goats by changing hormone levels and gene expression.
January 2024 in “International Journal of Herbal Medicine” Melanin is important for hair color, health, and UV protection.
January 2006 in “Yearbook of Dermatology and Dermatologic Surgery” Hair graying is caused by the loss of pigment cells due to poor maintenance of stem cells in the hair follicle.
101 citations
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January 1997 in “Journal of Investigative Dermatology Symposium Proceedings” Nerves and chemicals in the body can affect hair growth and loss.
Sensory neuron and Merkel cell changes in the skin happen independently during normal skin maintenance.
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May 2009 in “Journal of Neuroscience” In late pregnancy, allopregnanolone reduces stress responses in rats by affecting brain chemicals.
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October 2009 in “Pharmacology Biochemistry and Behavior”
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January 2019 in “Frontiers in Neuroendocrinology” Postpartum depression is linked to changes in brain chemicals, inflammation, stress, and certain genes, and can potentially be identified by markers like specific steroids, serotonin levels, and vitamin D levels.
August 2023 in “International Journal of Molecular Sciences” The human scalp hair bulb contains different types of melanocytes with varying abilities to produce melanin.
February 2025 in “Ciencia Latina Revista Científica Multidisciplinar” Finasteride can help with hair loss and prostate issues but may negatively affect mood and the nervous system.
March 2011 in “Pigment Cell & Melanoma Research” The Agouti gene influences pigmentation and may have a developmental role in deer mice.
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March 2020 in “Journal of ethnopharmacology” Ginsenoside Rb1 slows down aging in mice by affecting cell growth, cell death, and metabolism.
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April 2005 in “Cell” Hair graying happens because certain cells aren't maintained properly.
September 2025 in “International Journal of Innovative Technologies in Social Science” Red light therapy may help rejuvenate skin and regrow hair.
28 citations
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November 2009 in “European Journal of Neuroscience” Progesterone and allopregnanolone increase glycine release in rat brain cells.
The YH complex, made from certain plant extracts, effectively promotes hair regrowth and could be a potential treatment for hair loss.
16 citations
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June 2019 in “Journal of Investigative Dermatology” miR-21 increases skin aging by reducing SATB1, affecting skin cell function.
January 2026 in “Current Issues in Molecular Biology” miR-5110 affects alpaca pigmentation by altering specific gene expressions.
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October 2021 in “International Journal of Cosmetic Science” Cirsium japonicum flower extract increases melanin production and could help treat depigmentation conditions.
December 2021 in “OPAL (Open@LaTrobe) (La Trobe University)” Montelukast is linked to increased risks of suicidal thoughts and depression.
April 1986 in “CRC Press eBooks” Hair color is determined by melanins produced in hair cells.
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August 2006 in “Laboratory Investigation” SCF and ET-1 together significantly increase skin pigmentation and melanin production.
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December 2024 in “Biomolecules & Therapeutics” Tanshinone compounds can help prevent hair loss caused by testosterone.
April 2023 in “Journal of Investigative Dermatology” Aging changes skin cells, leading to different DNA methylation and gene activity, affecting cell metabolism and aging signs.
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December 2024 in “Journal of Photochemistry and Photobiology B Biology” Pulsed wave red LED light is more effective than continuous wave light for promoting hair regrowth.
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September 2017 in “General and comparative endocrinology” Barn owls with smaller black spots have higher testosterone levels, which might be due to genetic effects on hormone regulation rather than hormone effects on coloration.
September 2024 in “Digital Commons - University of South Florida (University of South Florida)” Hormones can change ptarmigan feather color from white to pigmented.