Sulistiani, Ursula, Pangkahila, Wimpie, AND Pangkahila, Alex. " Administration of Creatine Monohydrate® increased the estrogen levels but have no effect on testosterone levels in male albino rats (rattus norvegicus) with moderate physical activity" IJAAM (Indonesian Journal of Anti-Aging Medicine) [Online], Volume 3 Number 2 (13 November 2019)