Ginseng is the most common ingredient among top-selling supplements for men’s sexual health (36). The English word ginseng derives from the Chinese term renshen. Ren means “person” and shen means “plant root”. This plant has been named in this manner as its roots resemble the lower limbs of a human, Traditionally, ginseng has been used to restore and enhance the normal well-being of the body. The effects are due to ginseng’s reactions with the central nervous system, metabolism, immune function and cardiovascular system. The principal active compounds are triterpene saponins known as ginsenosides. Animal studies have suggested that specific ginsenosides may be responsible for ginseng-mediated effects on copulatory behavior (37). Ginsenoside induces smooth muscle relaxation by hyperpolarizing the smooth muscle membrane via activation of large-conductance KCa channels (38).
These drugs facilitate erection by inhibiting the PDE5 enzyme, by blocking the degradation of cyclic guanosine monophosphate (cGMP) in the cavernous smooth muscles. This inhibition results in the prolonged activity of cGMP, which further decreases intracellular calcium concentrations, maintains smooth muscle relaxation and, hence, results in rigid penile erections.
Older age. A man’s risk increases past the age of 40, as age is the variable most strongly associated with impotence. This is due to changing hormones, higher risk for heart problems and those affecting circulation, and decreased sexual desire that often occurs with increasing age. For example, based on findings from the National Health and Social Life Survey, it’s been found that “men between 50–60 years old are more than 3 times as likely to experience erection problems and to report low sexual desire compared to men aged 18 to 29 years.” (3)
When considering vitamin supplementation for erectile dysfunction, one of the first vitamins that you may come across in literature would be Vitamin D. This is a vitamin that can be easily obtained through many types of dairy products like milk, cheese, and yogurt and is also in abundance if you live in a tropical climate. Sunlight is able to give us a natural dose of vitamin D daily.  Although vitamin D is usually associated with improving bone strength and prevention osteoporosis, another valuable feat of vitamin D is the fact that it helps reduce atherosclerosis. Studies confirm that there is a similar underlying mechanism that occurs between conditions like cardiovascular disease and erectile dysfunction. As blood vessels are damaged and filled with plaques, the diameter for blood to flow through is gradually reduced. After a few years, the amount of blood may be reduced substantially. Vitamin D is able to help activate cells that remove some of these dangerous plaques and delay the onset of ED. 
These underrated kernels are rich in zinc, and people with higher levels in their system have been shown to have a stronger drive than those with lower levels. They’re also a good source of magnesium, which boosts testosterone and keeps sperm healthy and viable. Pine nuts are the primary ingredient in pesto, so go Italian on your next date night, or sprinkle them on a salad with avocado, tomatoes and salmon.
To understand the physiology of erectile dysfunction, we need to know erection first. An erection occurs when impulses from the brain and genital nerves cause blood to fill the two chambers known as the corpora cavernosa in the male penis. This causes the penis to expand and stiffen. Anything that blocks these impulses or restricts blood flow to the penis can result in ED. This block may be caused by psychological, neurologic, hormonal, arterial, or cavernosal impairment or even from a combination of all these factors.3
Another natural treatment for erectile dysfunction to consider would be vitamin E. This is a vitamin that has been linked to chronic diseases in the past due to the antioxidant effects of this vitamin. Considering ED could be a manifestation of another chronic condition, it makes sense that vitamin E may have a role in reducing the symptoms of the disease. As a person ages, it is natural for the body to undergo more oxidative stress and damage as cells do not function as well as they once did. Rats who were given supplemental vitamin E were found to have reduced levels of oxidative damage to their tissues and had levels of NO and other factors that help induce an erection more similar to younger rats compared to rats without vitamin E supplementation. If patients incorporate vitamin E into their vitamins and dietary supplements for ED, their ED should improve. 
Pumpkin seeds are one of the best dietary sources of zinc and magnesium—essential minerals shown to boost testosterone levels and growth factor hormone, especially when combined. In fact, college football players who took a nightly zinc-magnesium supplement showed a 30 percent increase in testosterone levels and a 13 to 16 percent increase in leg strength, one eight-week trial found. The seeds are also a rich source polyunsaturated fatty acids shown to boost prostaglandins — hormone-like substances that play a key role in feeling turned on. Grab some, or choose any of these 50 Best Snacks for Weight Loss!
27. Haahr MK, Jensen CH, Toyserkani NM, et al. Safety and Potential Effect of a Single Intracavernous Injection of Autologous Adipose-Derived Regenerative Cells in Patients with Erectile Dysfunction Following Radical Prostatectomy: An Open-Label Phase I Clinical Trial. EBioMedicine 2016;5:204-10. 10.1016/j.ebiom.2016.01.024 [PMC free article] [PubMed] [CrossRef]
ED is caused by vascular, hormonal, neurogenic, pharmacological, or psycho-genic factors. Performance anxiety where the person fears failing in a sexual scenario is a common psychogenic cause for ED.3 Neurogenic causes are related to diseases like Alzheimer's, Parkinson's, stroke or spinal cord injuries. Radical removal of the prostate (also called prostatectomy) is the cause of nerve-related ED as nerve injury is possible despite advances in surgical methods.4
Recent University of Texas findings suggest that men who drink two to three cups of java a day—or 85 to 170 milligrams of caffeine from other beverages—are 42 percent less likely to have erectile dysfunction than those who consume up to seven milligrams of the stimulant daily. And those who throw back four to seven cups were 39 percent less likely to have the condition than their less jittery counterparts. The trend holds true among overweight, obese and hypertensive men, but not for those with diabetes, a condition that often causes the issue. So, how exactly does drinking coffee keep things going strong? The scientists say that the stimulant triggers a series of reactions in the body that ultimately increase blood flow south. And get the abs you want—quickly—and melt up to 10 pounds in one week with our new diet plan, The 7-Day Flat-Belly Tea Cleanse!
Erectile problems can sometimes be linked to cardiovascular issues. If your heart isn't in full health, your sex life maybe suffering as result. Men who suffer with moderate to severe erection problems have significantly lower levels of folic acid than guys without the issue. The B vitamin has been shown to work with nitric oxide which would explain why an absence of it would lead to problems in the manhood. This seems to help with erectile dysfunction more than some medications. Treatment with folic acid resulted in men having an increase in their erectile strength.
A study published in May 2014 in The Journal of Sexual Medicine found that some men can reverse erectile dysfunction with healthy lifestyle changes, such as exercise, weight loss, a varied diet, and good sleep. The Australian researchers also showed that even if erectile dysfunction medication is required, it's likely to be more effective if you implement these healthy lifestyle changes.