L-arginine is an amino acid that helps make proteins. It also becomes the gas nitric oxide (NO) in the body. NO is important for erectile function because it helps blood vessels relax, so more oxygen-rich blood can circulate through your arteries. Healthy blood flow to the arteries of the penis is essential for normal erectile function.
Maca root has been studied for its use in alleviating antidepressant-induced sexual dysfunction in women. Certain antidepressants cause side effects like low libido, vaginal dryness, and difficulty reaching orgasm