Supplement study sees if testosterone gets a boost

This study tested whether a supplement called geranylgeraniol (GG) can raise testosterone levels in healthy men and women aged 40 to 65. Researchers measured total and free testosterone in 34 participants over 18 weeks using a crossover design. The goal was to see if GG improves hormone levels and self-reported health, but this is an early-stage investigation, not a treatment for any disease.