research Three Cases of Liver Toxicity With a Dietary Supplement Intended to Stop Hair Loss 6 citations, December 2014 in “PubMed” A supplement for hair loss with green tea in it may cause liver problems.
research Effect of a Nutritional Supplement on Hair Loss in Women 38 citations, January 2015 in “Journal of Cosmetic Dermatology” The nutritional supplement improved hair density and reduced hair loss in women with female pattern hair loss.