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A meta-analysis of six randomized controlled trials found zinc plus folate therapy increased sperm concentration and improved sperm morphology, but did not impact sperm motility or hormone levels

It enhances both synthesis and breakdown of extracellular matrix components, such as collagen, glycosaminoglycans (including dermatan and chondroitin sulfate), and decorin, and regulates metalloproteinases and their inhibitors (Pickart, Vasquez-Soltero, and Margolina 2015)

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Research chemical vendors selling peptide powders operate without consumer return policies, GMP manufacturing requirements, or third-party testing documentation standards comparable to regulated supplement brands