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In men, libido, blood vessel dysfunction, mental health, relational issues, and a history of erectile dysfunction each affect one another and have inherent interdependency.[4] We see the prevalence of ED increasing with age due to declining hormones and vascular dysfunction, while mental health and psychogenic dysfunction are more common factors at a younger age.[5],[6] Several medications can contribute to ED, including antidepressants (in particular, selective serotonin reuptake inhibitors, an issue which is discussed further in the article Ashwagandha and Saffron: Key Tools for a New Era of Living[CD1] ) and antihypertensives (thiazide diuretics, beta blockers and spironolactone), which are among the most commonly prescribed medications in the U.S.[7] Perhaps not surprisingly, the use of substances and recreational drugs, including alcohol,[8] nicotine,[9] marijuana,[10] and cocaine,[11] are also associated with increased rates of ED

MTHFR is a key enzyme in folate metabolism

The glycine may contribute to slightly better stability during storage, but the fundamental requirements do not change

Gene expression studies show rapid upregulation (within 10 min) of multiple pro-regenerative genes, including VEGF, EGR-1, and various MAPK pathway components (Seiwerth et al., 2021)

2013 Jun;12(3):415-25