Male hormones such as testosterone stimulate hair growth, increase size and intensify the growth and pigmentation of hair.
https://en.wikipedia.org/wiki/Hirsutism[...] total testosterone, and bioavailable testosterone were associated with DNA methylation
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6295101DNA methylation-dependent gene expression to neuronal plasticity is well established
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4963592Today we know that the capacity of the brain to physically change throughout our lifetime is the basis of all adaptation, learning, and memory
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5347979
