research Epidermal Retinol Dehydrogenases Cyclically Regulate Stem Cell Markers and Clock Genes and Influence Hair Composition April 2024 in “Communications biology” Enzymes involved in Vitamin A metabolism affect hair growth and type in mice.
research Indian Head Cactus (Parodia Ottonis Ssp. Ottonis) Extract Promotes Hair Growth in Cultured Human Follicle Dermal Papilla Cells April 2023 in “Biomedical Journal of Scientific and Technical Research” Indian head cactus extract may help hair grow by boosting important cell activity and gene expression.