January 2013 in “วารสารเภสัชศาสตร์อีสาน (Isan Journal of Pharmaceutical Sciences, IJPS)” This study found that Carthamus tinctorius floret ethanolic extract stimulated melanogenesis in B16F10 murine melanoma cells without cytotoxicity, suggesting its potential as a treatment for gray hair.
3 citations
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May 2020 in “Acta pharmaceutica” The researchers reported that protocatechuic acid reduced melanin synthesis and enhanced antioxidant activity in cultured human hair follicle melanocytes, indicating potential for skin whitening applications.
67 citations
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August 2013 in “International Journal of Cosmetic Science” This review discusses the role of oxidative stress in hair greying and suggests that understanding melanocyte susceptibility at different follicular locations may help develop therapies for preventing and reversing the process; it reports no new experimental results.
This study found that Polygonum multiflorum radix ethanol extract may promote melanin synthesis, potentially helping to turn gray hair back to black by enhancing antioxidant activity and increasing tyrosinase expression.
15 citations
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April 2011 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that A(3)B(5) downregulates melanin production and suppresses melanoma cell growth by promoting proteasomal degradation of TRP-2.