1. Relationship between serum levels of testosterone, zinc and selenium in infertile males attending fertility clinic in Nnewi, south east Nigeria.
    Link - http://europepmc.org/article/med/23678636

  2. What Are Zinc Supplements Good For? Benefits and More
    Link - https://www.healthline.com/nutrition/zinc-supplements#_noHeaderPrefixedContent

  3. Zinc status and serum testosterone levels of healthy adults
    Link - https://www.sciencedirect.com/science/article/pii/S089990079680058X

  4. Effect of Zinc and Selenium Supplementation on Serum Testosterone and Plasma Lactate in Cyclist After an Exhaustive Exercise Bout
    Link - https://link.springer.com/article/10.1007/s12011-011-9138-2

  5. Effects of dietary zinc depletion on seminal volume and zinc loss, serum testosterone concentrations, and sperm morphology in young men
    Link - https://academic.oup.com/ajcn/article-abstract/56/1/148/4715610

  6. Zinc Absorption by Young Adults from Supplemental Zinc Citrate Is Comparable with That from Zinc Gluconate and Higher than from Zinc Oxide
    Link - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3901420/