1. M;, Fui. “Lowered Testosterone in Male Obesity: Mechanisms, Morbidity and Management.” Asian Journal of Andrology, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/24407187/.
2. Bhasin, Shalender, et al. “Testosterone Dose-Response Relationships in Healthy Young Men.” American Journal of Physiology-Endocrinology and Metabolism, 1 Dec. 2001, journals.physiology.org/doi/full/10.1152/ajpendo.2001.281.6.E1172.
3. Gani, Linsey Utami, and Choon How How. “PILL Series. Vitamin D Deficiency.” Singapore Medical Journal, Singapore Medical Association, Aug. 2015, www.ncbi.nlm.nih.gov/pmc/articles/PMC4545131/.
4. Pilz . “Effect of Vitamin D Supplementation on Testosterone Levels in Men.” Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/21154195/.
5. ME. Angeline, AO. Gee, et al. “Prevalence of Vitamin D Inadequacy in Athletes: A Systematic-Review and Meta-Analysis.” Sports Medicine, Springer International Publishing, 1 Jan. 1970, link.springer.com/article/10.1007/s40279-014-0267-6.
6. DT;, Papadimitriou. “The Big Vitamin D Mistake.” Journal of Preventive Medicine and Public Health = Yebang Uihakhoe Chi, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/28768407/.
7. Prasad . “Zinc Status and Serum Testosterone Levels of Healthy Adults.” Nutrition (Burbank, Los Angeles County, Calif.), U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/8875519/.
8. M;, Cordova. “Behaviour of Zinc in Physical Exercise: a Special Reference to Immunity and Fatigue.” Neuroscience and Biobehavioral Reviews, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/7566745/.
9. Maggio . “The Interplay between Magnesium and Testosterone in Modulating Physical Function in Men.” International Journal of Endocrinology, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/24723948/.
10. HC;, Nielsen. “Update on the Relationship between Magnesium and Exercise.” Magnesium Research, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/17172008/.
11. M;, Walker. “Mg Citrate Found More Bioavailable than Other Mg Preparations in a Randomised, Double-Blind Study.” Magnesium Research, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/14596323/.
12. Lopresti, Adrian L, et al. “A Randomized, Double-Blind, Placebo-Controlled, Crossover Study Examining the Hormonal and Vitality Effects of Ashwagandha ( Withania Somnifera) in Aging, Overweight Males.” American Journal of Men’s Health, SAGE Publications, 2019, www.ncbi.nlm.nih.gov/pmc/articles/PMC6438434/.
13. Mahdi, Abbas Ali, et al. “Withania Somnifera Improves Semen Quality in Stress-Related Male Fertility.” Evidence-Based Complementary and Alternative Medicine : ECAM, Hindawi Publishing Corporation, 29 Sept. 2009, www.ncbi.nlm.nih.gov/pmc/articles/PMC3136684/.
14. Wankhede, Sachin, et al. “Examining the Effect of Withania Somnifera Supplementation on Muscle Strength and Recovery: A Randomized Controlled Trial.” ResearchGate.
15. BA;, Löth. “Improved Nasal Breathing in Snorers Increases Nocturnal Growth Hormone Secretion and Serum Concentrations of Insulin-like Growth Factor 1 Subsequently.” Rhinology, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/9923061/.
16. M;, Schwab. “Filtration of Particulates in the Human Nose.” The Laryngoscope, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/9432080/.
17. Richard Ronay, William von Hippel. “The Presence of an Attractive Woman Elevates Testosterone and Physical Risk Taking in Young Men – Richard Ronay, William Von Hippel, 2010.” SAGE Journals, journals.sagepub.com/doi/abs/10.1177/1948550609352807.
18. PH;, López. “Attractive Men Induce Testosterone and Cortisol Release in Women.” Hormones and Behavior, U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/19303881/.
19. J. Altmann, R. Sapolski, et al. “Tandem Androgenic and Psychological Shifts in Male Reproductive Effort Following a Manipulated ‘Win’ or ‘Loss’ in a Sporting Competition.” Human Nature, Springer US, 1 Jan. 1995, link.springer.com/article/10.1007%2Fs12110-018-9323-5.