5α-Androstane-3α, 17β-diol glucuronide is a C19 steroid produced mainly as a metabolite of testosterone and dihydrotestosterone (DHT). It is largely produced in target peripheral tissues such as the skin, especially around hair follicles. The stimulation by large amounts of 3 Diol G leads to excessive hair formation, notably where hair is not normally present in women. Diabetic patients under cyclosporine A therapy have shown increased 3 Diol G levels.