August 2026 in “Pharmacy Reports” This study found that a nanoemulsion hair spray formula with 25% PEG 400 showed promising physicochemical stability, but further research is needed to assess its colloidal stability and efficacy in hair growth.
4 citations
,
November 2017 in “PubMed” This study found that Synsepalum dulcificum seed oil hair treatment significantly reduced hair breakage and improved hair health indices in women, outperforming both placebo and argan oil treatments.
10 citations
,
June 2019 in “International Journal of Cosmetic Science” This review discusses the potential benefits of phytochemicals for hair care and emphasizes the need for more robust preclinical and clinical studies, without reporting new clinical results.
This study suggests that 9-Octadecenoic acid (Z)-, 2,3-dihydroxypropyl ester from African Yam bean seeds may inhibit the human 5α-reductase II enzyme, potentially helping manage BPH, although further studies are needed.
2 citations
,
May 2020 in “Journal of the American Academy of Dermatology” This study suggests that higher use of phytoestrogen-containing hair and personal care products may increase the association between permanent hair dye, straightener use, and breast cancer risk in black women.