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Glutathione is able to positively influence the quality of sperm in men

Similarly, dietary approaches that increase NO precursors or mitigate oxidative stress (such as dietary nitrate, CIT/L-arginine, and antioxidant polyphenols) can improve exercise-induced enhancements in endothelial function and microvascular blood flow, thereby augmenting substrate delivery to trained musculature and enhancing training responsiveness in geriatric populations (81)

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2018 Sep 19;10(9):1334

Heart health and memory supplement L-carnitine helps maintain healthy nitric oxide concentrations, supporting already-healthy blood pressure levels