- "Ashwagandha Root Extract Improves Testosterone Levels and Male Fertility" – Wankhede S, et al. (American Journal of Men's Health, 2015)
- "Withania somnifera (Ashwagandha) Reduces Stress and Improves Sexual Well-Being" – Lopresti AL, et al. (Medicine (Baltimore), 2019)
- "Panax Ginseng Improves Erectile Function in Men: A Systematic Review" – Jang DJ, et al. (British Journal of Clinical Pharmacology, 2008)
- "Red Ginseng for Treating Erectile Dysfunction: A Meta-Analysis" – Borrelli F, et al. (British Journal of Clinical Pharmacology, 2018)
- "Epimedium (Horny Goat Weed) and Its Active Compound Icariin in Erectile Function" – Dell'Agli M, et al. (Journal of Sexual Medicine, 2008)
- "Icariin Enhances Erectile Function via Nitric Oxide Pathways" – Shindel AW, et al. (Journal of Sexual Medicine, 2010)
- "Tribulus Terrestris Supplementation and Its Effects on Testosterone and Athletic Performance" – Rogerson S, et al. (Journal of Strength and Conditioning Research, 2007)
- "Effects of Tribulus Terrestris on Sexual Function in Men: A Systematic Review" – Santos CA, et al. (Journal of Ethnopharmacology, 2014)
- "Adaptogens and Their Role in Stress Reduction and Performance Enhancement" – Panossian AG, et al. (Current Clinical Pharmacology, 2010)
- "Herbal Medicine for Sexual Health and Erectile Function: A Review" – Shamloul R, et al. (Journal of Sexual Medicine, 2010)