This article explores the potential applications of polyglutamic acid in cosmetics, discussing its benefits for skincare and haircare, but reports no new experimental results.
February 2026 in “Archives of Dermatological Research” In this study, microneedle-assisted delivery of polyglutamate significantly improved hair parameters, scalp symptoms, and quality of life in androgenetic alopecia patients, with no serious adverse reactions reported.
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August 1991 in “Journal of The American Academy of Dermatology” This article reviews methotrexate's pharmacokinetics and toxicity, emphasizing the role of urinary excretion and leucovorin in avoiding most toxic reactions; it provides no new clinical results.