Based on the benefits of this supplement, it appears that patients will clearly benefit from supplementation if levels of zinc are low. In North America, it may be less common due to diets so taking zinc may not necessarily help patients who already have adequate levels of zinc if their levels are within normal limits. Many studies prove that zinc has at least an indirect impact on erectile dysfunction and supplementation will improve in those patients so I would advise considering zinc supplementation for erectile dysfunction if it is determined that your plasma levels of zinc are low. 
Male erectile dysfunction (ED) has been defined as the persistent inability to attain and/or maintain an erection sufficient for sexual performance (1). ED is very common, and its prevalence as well as severity increases with age (2). It has been recognized that the major cause of ED is atherosclerosis affecting the pelvic vasculature (3). The presence of ED has been known to predict future cardiovascular disease, and early detection may allow timely modification of remediable risk factors, or lead to the diagnosis of occult cardiovascular disease (4, 5).
Low levels of zinc can be the cause for a variety of health-related problems. Zinc is a key mineral that cells use to metabolize nutrients. Immune function, DNA and protein production, and cell division are all related to zinc levels in the body. Zinc also enables the male body to produce testosterone. Because of this, your levels of zinc may affect erectile dysfunction.
Begot, I., Peixoto, T. C. A., Gonzaga, L. R. A., Bolzan, D. W., Papa, V., Carvalho, A. C. C., ... & Guizilini, S. (2015, March 1). A Home-Based Walking Program Improves Erectile Dysfunction in Men With an Acute Myocardial Infarction. The American Journal of Cardiology, 115(5), 5741-575. Retrieved from http://www.ajconline.org/article/S0002-9149(14)02270-X/abstract
"Nightly treatment may help promote erectile function as the result of this drugs' beneficial effect on endothelial cells," Frank Sommer, MD, said in a news conference. Endothelial cells line the walls of the blood vessels. Erections occur when the blood vessels in the penis dilate and fill with blood. Sommer, chief of andrology in the department of urology at the University of Cologne in Cologne, Germany, presented his findings at a meeting of the American Urological Association.
Alprostadil is an FDA-approved erectile dysfunction drug that can be injected directly into the penis to trigger an automatic erection. "Penile injection is the most effective type of ED treatment for men who can't take oral treatment," says Nelson Bennett, MD, a urologist at the Lahey Clinic in Burlington, Mass. In fact, it has an 85 percent success rate. Possible side effects include a burning sensation and priapism, an erection that lasts more than four hours and requires medical treatment.
Although they work in similar ways, each oral medication has a slightly different chemical makeup. These minor differences affect the way each medication works, such as how quickly it takes effect and wears off, and the potential side effects. Your doctor will consider these factors as well as any health problems you have and possible interactions with other medications you take.

How common is impotence? According to findings from several studies, including “The Massachusetts Male Aging Study,” overall prevalence for men between 40–70 years old is around 52 percent (or around 30 percent of all men between 18–60 years old). That’s right — nearly half of all men over 40 experience erectile dysfunction symptoms at some point. Not surprisingly, research demonstrates that impotence is increasingly prevalent with age. Around 40 percent of men in their 40s experience sexual dysfunction. Up to 70 percent of men in their 70s experience ED. (1) Every year more than 617,000 new cases of impotence occur in the United States alone.
Men can judge themselves pretty harshly when it comes to their performance in between the sheets. The unsettling fear of not being able to rise to the occasion becomes a reccurring nightmare for men that is often equated with failure, loss of dignity, and masculinity. If you suffer from erectile dysfunction (ED), don’t be so hard on yourself, since impotence can almost always be improved with treatment, without having to rely on Viagra or other medications. Whether you suffer from ED, or hope to prevent the condition, here are six tips to overcome impotence without the side effects of the little blue pill.
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