Sources and Scientific References

[1] Erectogenic and neurotrophic effects of icariin, a purified extract of horny goat weed. Alan W Shindel, Zhong-Chen Xin, Guiting Lin, Thomas M Fandel – J Sex Med 2010
[2] Human Safety and Pharmacokinetics Study of Orally Administered Icariin. E. Sherwood Brown, Collette Bice, William C. Putman, Richard Leff – Nat. Product Communications 2019
[3] Icariin Improves Age-Related Testicular Dysfunction by Alleviating Sertoli Cell Injury. Chaoqi Liu, Yaoyan Dun, Jie Wu, Changcheng Zhang, Ding Yuan – Front. Pharmacol 2020
[4] Flavonoids: an overview. A. N. Panche, Diwan, S.R. Chandra – J Nutr Sci. 2016
[5] Phytoandrogenic properties of Eurycoma longifolia as natural alternative to testosterone replacement therapy. A George, R Henkel – Andrologia 2014
[6] Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism. M I B M Tambi, M K Imran, R R Henkel – Andrologia 2012
[7] Efficacy of Tongkat Ali (Eurycoma longifolia) on erectile function improvement. Surachai Kotirum, Shaiful Bahari Ismail, Nathorn Chaiyakunapruk – Complement Ther Med. 2015
[8] Randomized Clinical Trial on the Use of PHYSTA Freeze-Dried Water Extract of Eurycoma longifolia for the Improvement of Quality of Life and Sexual Well-Being in Men. Shaiful Bahari Ismail, Wan Mohd Zahiruddin Wan Mohammad, Annie George – Evid Based Complement Alternat Med. 2012
[9] The effect of Eurycoma longifolia on sperm quality of male rats. Kit-Lam Chan, Bin-Seng Low, Chin-Hoe Teh, Prashanta K Das – Nat Prod Commun 2009
[10] Physiological aspects of male libido enhanced by standardized Trigonella foenum-graecum extract and mineral formulation. Elizabeth Steels, Amanda Rao, Luis Vitetta – Phytother Res 2011
[11] Effects of a purported aromatase and 5α-reductase inhibitor on hormone profiles in college-age men. Colin Wilborn, Lem Taylor, Chris Poole, Cliffa Foster, Darryn Willoughby, Richard Kreider – Int J Sport Nutr Exerc Metab 2010
[12] Citrulline and nitrogen homeostasis: an overview. C Breuillard, L Cynober, C Moinard – Amino Acids 2015
[13] Influence of L-citrulline and watermelon supplementation on vascular function and exercise performance. Arturo Figueroa, Alexei Wong, Salvador J Jaime, Joaquin U Gonzales – Curr Opin Clin Nutr Metab Care 2017
[14] Harvard Health Publishing – 2022
[15] Ameliorative effects of stinging nettle (Urtica dioica) on testosterone-induced prostatic hyperplasia in rats. A Nahata, V K Dixit – Andrologia 2012
[16] Efficacy and safety of a combination of Sabal and Urtica extract in lower urinary tract symptoms. Nikolai Lopatkin, Andrey Sivkov, Sandra Schläfke, Petra Funk – Int Urol Nephrol 2007
[17] Side-effect profile of sildenafil citrate (Viagra) in clinical practice. S G Moreira Jr, R E Brannigan, A Spitz, F J Orejuela, L I Lipshultz, E D Kim – Urology 2000
[18] Four-Year Review of Sildenafil Citrate. Andrew R McCullough – Rev Urol. 2002