343 citations
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December 2008 in “Endocrine Reviews” Metformin helps with menstrual cycles and insulin levels in PCOS but is less effective for hair growth, diabetes prevention, and weight loss, and may improve fertility and reduce diabetes risk.
306 citations
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April 2019 in “International Journal of Molecular Sciences” The skin has a complex immune system that is essential for protection and healing, requiring more research for better wound treatment.
295 citations
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September 2006 in “Cell Cycle” The conclusion is that using drugs to block the TOR pathway might slow aging and prevent age-related diseases.
264 citations
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January 2008 in “Journal of biomedical optics” Zinc oxide nanoparticles in sunscreen do not penetrate deep into the skin.
249 citations
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November 2003 in “Clinical endocrinology” Insulin resistance is a key factor in polycystic ovary syndrome, but genetics may also contribute.
245 citations
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January 2018 in “Bone Research” TGF-β is crucial for tissue repair and can cause diseases if not properly regulated.
210 citations
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July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color production in mice is closely linked to the hair growth phase and may also influence hair growth itself.
207 citations
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April 2006 in “Journal of The American Academy of Dermatology” Iron deficiency may be related to hair loss, but there's not enough evidence to recommend iron screening or supplements for all hair loss patients.
205 citations
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March 2012 in “Science Translational Medicine” PGD2 stops hair growth and is higher in bald men with AGA.
200 citations
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October 2009 in “European journal of endocrinology” Metformin helps manage polycystic ovary syndrome by improving insulin resistance and ovulation, but more research is needed on its full effects.