Ginseng. Korean red ginseng has long been used to stimulate male sexual function, but few studies have tried systematically to confirm its benefits. In one 2002 study involving 45 men with significant ED, the herb helped alleviate symptoms of erectile dysfunction and brought "enhanced penile tip rigidity." Experts aren't sure how ginseng might work, though it's thought to promote nitric oxide synthesis. "I would recommend ginseng [for men with ED]," says Espinosa. Discuss with your doctor before taking it since ginseng can interact with drugs you may already be taking and cause allergic reactions.
If you want to go long enough to help your date reach the big O, reach for some oatmeal. The popular breakfast cereal is a good source of l-arginine, an amino acid commonly used to treat erectile dysfunction. Plus, whole grains like oatmeal also help lower cholesterol levels. Having high cholesterol can lead to atherosclerosis, a condition that clogs and narrows arteries, impairing blood flow. This could eventually lead to heart problems, but you’ll likely notice issues below the belt first. The arteries surrounding the genital area are narrower than coronary blood vessels, so they’re more susceptible to clots. Simply put, the better your cholesterol levels are, the better your erection will be, too.
If you’re looking for a way to simultaneously boost your libido and calm those pre-date jitters, pour yourself a glass of red wine. According to a study printed in Nutrition Journal, vino could elevate your testosterone levels. In lab tests, researchers found that quercetin, a compound in wine, blocks an enzyme that causes the body to excrete testosterone, thereby increasing the amount of T circulating in the blood. Wine’s rich antioxidant profile also triggers nitric oxide production, which relaxes artery walls. This increases blood flow down south, creating feelings of erotic excitement. For some great picks for your next tipple, check out our 16 best wines for weight loss.
Dietary supplements are another avenue that patients can explore when it comes to treating their ED. Many products exist on the market but be warned that they may not have the scientific proof that can support claims of better erections. In one study done on multiple supplements that were proven to not work, it was found that patients found improvement in their ED 25 percent of the time. This suggests that supplements that do not work have a "placebo effect." This means that if a patient believes the medication truly works, he will notice improvements in his symptoms. This is a psychological phenomenon and can also be considered a root of why ED can occur. Depression or anxiety are two common reasons for ED and if patients take supplements that they believe will help them, they may have more confidence in sustaining an erection. 
The medications also require a healthy endothelium and healthy arteries capable of providing increased blood flow to work. If the sex organ arteries the size of a swizzle stick are severely diseased, there will be no “bada-boom bada-bing” an hour after taking them. These medications only work by enhancing the natural effects of a healthy endothelium.
In a prospective human phase 1 open-label and single-arm study reported by Haahr et al. (27), 17 men with refractory post radical prostatectomy ED were given a single intracavernosal injection of autologous adipose-derived regenerative cells (ADRCs) freshly isolated after a liposuction. The procedures were well-tolerated and over a 6-month follow-up period, 8 of 17 men showed improvement of their erectile function.
Alprostadil self-injection. With this method, you use a fine needle to inject alprostadil (Caverject Impulse, Edex) into the base or side of your penis. In some cases, medications generally used for other conditions are used for penile injections on their own or in combination. Examples include papaverine, alprostadil and phentolamine. Often these combination medications are known as bimix (if two medications are included) or trimix (if three are included).
Experts feel that treating erectile dysfunction on your own, without consulting a doctor, is unsafe. "If you have ED, the first thing you need is a diagnosis," says impotence expert Steven Lamm, MD, a New York City internist and the author of The Hardness Factor (Harper Collins) and other books on male sexual health. He says men with severe erectile dysfunction probably need one of the prescription ED drugs, which include Levitra (vardenafil) and Cialis (tadalafil) as well as Viagra. But, he says, mild ED -- including the feeling that "you're not as hard as you could be" -- often responds to natural remedies.