January 2020 in “Journal of St. Marianna University” This study found that human placenta extract may enhance hair growth by increasing PG-E2 and PG-F2a production while decreasing PG-D2 levels in cultured hair follicle keratinocytes.
48 citations
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May 2021 in “Molecules” The researchers found that plant extracts from Papaver rhoeas L., Clitoria ternatea L., and Carthamus tinctorius L. are effective natural cosmetic dyes, offering intense and stable colors without cytotoxicity.
March 2025 in “Molecules” This study explored the in vitro skin penetration of two compounds from Tectona grandis leaf extract used for standardization and found that compound 1 penetrates more efficiently than compound 2, especially with a propylene glycol enhancer.
February 2024 in “Trends in Sciences” This study examined the stability of two 5α-reductase inhibitors in Tectona grandis extracts, finding that they are more stable in acidic environments and degrade rapidly under heat and light unless protected, suggesting the need for careful storage when developing anti-hair loss medications.
21 citations
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January 2015 in “Journal of Dermatological Science” This study investigates the potential hair growth effects of Panax ginseng and its ginsenosides on human hair follicles, suggesting mechanisms similar to those of minoxidil.
