Studies & References
Note: The following references relate to individual ingredients commonly used in testosterone support supplements. These studies are provided for educational purposes and do not constitute claims about TestoTonic specifically. Individual results may vary.
At Natural Living Now, we believe in transparency. Below you'll find scientific references related to ingredients commonly found in natural testosterone support supplements.
Ingredient Research
Zinc
Zinc and Testosterone Levels
Prasad AS, et al. "Zinc status and serum testosterone levels of healthy adults." Nutrition. 1996 May;12(5):344-8.
Zinc Supplementation Research
Kilic M, et al. "The effect of exhaustion exercise on thyroid hormones and testosterone levels of elite athletes receiving oral zinc." Neuro Endocrinol Lett. 2006 Feb-Apr;27(1-2):247-52.
Vitamin D
Vitamin D and Male Hormones
Pilz S, et al. "Effect of vitamin D supplementation on testosterone levels in men." Horm Metab Res. 2011 Mar;43(3):223-5.
Vitamin D Status and Testosterone
Wehr E, et al. "Association of vitamin D status with serum androgen levels in men." Clin Endocrinol (Oxf). 2010 Aug;73(2):243-8.
Ashwagandha (Withania somnifera)
Ashwagandha and Male Wellness
Lopresti AL, et al. "A Randomized, Double-Blind, Placebo-Controlled, Crossover Study Examining the Hormonal and Vitality Effects of Ashwagandha in Aging, Overweight Males." Am J Mens Health. 2019 Mar-Apr;13(2).
Ashwagandha Extract Study
Ambiye VR, et al. "Clinical Evaluation of the Spermatogenic Activity of the Root Extract of Ashwagandha in Oligospermic Males." Evid Based Complement Alternat Med. 2013;2013:571420.
Fenugreek
Fenugreek Extract Research
Rao A, et al. "Testofen, a specialised Trigonella foenum-graecum seed extract reduces age-related symptoms of androgen decrease." Aging Male. 2016 Jun;19(2):135-42.
D-Aspartic Acid
D-Aspartic Acid and Hormonal Response
Topo E, et al. "The role and molecular mechanism of D-aspartic acid in the release and synthesis of LH and testosterone in humans and rats." Reprod Biol Endocrinol. 2009 Oct 27;7:120.
General Men's Health Research
Testosterone and Aging
Harman SM, et al. "Longitudinal effects of aging on serum total and free testosterone levels in healthy men." J Clin Endocrinol Metab. 2001 Feb;86(2):724-31.
Lifestyle Factors and Testosterone
Travison TG, et al. "The relative contributions of aging, health, and lifestyle factors to serum testosterone decline in men." J Clin Endocrinol Metab. 2007 Feb;92(2):549-55.
Important Disclaimer
The references provided above are for educational purposes only. They relate to individual ingredients or general health topics and should not be interpreted as claims that TestoTonic will produce the same results as described in these studies.
Individual results may vary. TestoTonic is a dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease. Always consult with a healthcare professional before starting any new supplement regimen.
Questions?
If you have questions about our ingredients or would like more information, please contact us at [email protected].