In addition, this amino acid increases sperm volume and makes sperm quality better. Moreover, L-Arginine is most effective for men with initially low NO levels. Thus, this amino acid normalizes endothelial nitric oxide synthesis. That contributes to the vascular function restoration, including penile vascular function. The amino acid prevents aging changes in the blood vessels and dramatically reduces the harmful effects of nicotine on arteries with capillaries.
Erectile dysfunction supplements and other natural remedies have long been used in Chinese, African and other cultures. But unlike prescription medications for erectile dysfunction, such as sildenafil (Viagra), vardenafil (Levitra, Staxyn), tadalafil (Cialis, Adcirca) and avanafil (Stendra), erectile dysfunction herbs and supplements haven't been well-studied or tested. Some can cause side effects or interact with other medications. And the amount of the active ingredient can vary greatly from product to product.