Shindel, A. W., Xin, Z.-C., Lin, G., Fandel, T. M., Huang, Y.-C., Banie, L., … Lue, T. F. (2010, February 5). Erectogenic and neurotrophic effects of icariin, a purified extract of horny goat weed (Epimedium spp.) in vitro and in vivo. The Journal of Sexual Medicine, 7(4), 1518-1528. Retrieved from http://onlinelibrary.wiley.com/doi/10.1111/j.1743-6109.2009.01699.x/full
It hits where it hurts the most – your member. Erectile dysfunction or ED is a spoiler in bed and can shatter your ego irreparably. ED, also called impotence, is the inability of a man to achieve and maintain an erection sufficient to permit satisfactory sexual intercourse.1 Men who cannot get or maintain an erection that lasts long enough or is rigid enough to complete sexual intercourse are considered to have erectile dysfunction.
You might spice up your love life by adding some chili peppers to your diet. The stuff in cayennes, jalapenos, habaneros, and other peppers that give them their heat relaxes the arteries -- and that helps blood flow to the heart and other organs, including the penis. Chilies can also help lower blood pressure and cholesterol and prevent blood clots.
Before taking any medication for erectile dysfunction, including over-the-counter supplements and herbal remedies, get your doctor's OK. Medications for erectile dysfunction do not work in all men and might be less effective in certain conditions, such as after prostate surgery or if you have diabetes. Some medications might also be dangerous if you:
Derived from the bark of a West African evergreen tree, yohimbe was the go-to ‘script for a wonky willy prior to the advent of wonder drugs like Viagra, Walker says. “Yohimbe enhances sexual performance both by blocking certain neurotransmitters in the brain and by increasing the release of nitric oxide in the cavernosal nerves of the penis,” he explains. And it pairs well with other erection-friendly tablets: A 2010 study in the Iranian Journal of Psychiatry found that a combination of yohimbe and L-arginine successfully helps guys get it up. However, yohimbe also has a handful of side effects, including elevated blood pressure and anxiety, so definitely talk to your doctor before you start on the supp.
Eating more fruit, vegetables, fish, and less red meat and refined grains can decrease the risk of ED. Maintaining a healthy weight is also important, since men who have a waist that is 42-inches or more are 50 percent more likely to get erectile dysfunction. Obesity increases the risk of vascular disease and diabetes, which are known to contribute to ED.
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]
The Institute of Medicine recommends cumulative daily vitamin D intake of 600 international units (IU) for adults between 18 and 70 years of age , and 800 IU for those over 80. A 3oz serving of salmon contains about 450IU, while an 8oz. glass of milk only has about 100IU. Low vitamin D levels may be an independent, potentially modifiable risk for ED, so it’s worth taking Vitamin D supplements for your “D.” However, keep your daily vitamin D supplement intake below 4,000IU, as too much vitamin D can be toxic.
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. 
This tasty green nut may be more than a great snack. A study published in the International Journal of Impotence Research examined how eating pistachios affected ED. Measurements were taken before men were put on a nut-heavy diet and after. Consuming pistachios for several weeks showed improvement in several parameters of ED, including improved International Index of Erectile Function scores for study participants.
Need a snack? Choose nuts, researchers from Turkey suggest. After 17 men with ED ate 100 grams of pistachios for three weeks, they all reported a significant improvement in their erectile function, ability to orgasm, libido, sexual satisfaction, and overall happiness in life. As a bonus, they all had higher HDL, or “good,” cholesterol and lower LDL, or “bad,” cholesterol, too.
Red Ginseng — One small randomized trial found evidence that red ginseng may offer modest improvements in ED symptoms (as compared with placebo). A meta-anaylsis published in the British Journal of Clinical Pharmacology states, “Traditionally red ginseng has been used to restore and enhance normal well-being, and is often referred to as an adaptogenic….Possible mechanisms of action of red ginseng include hormonal effects similar to those of testosterone. Others have postulated that red ginseng might induce relaxation of the smooth muscles.” (5)
Impotence, or erectile dysfunction (ED), is the inability for a man to sustain an erection long enough for normal, satisfying sexual intercourse. To understand the underlying causes of impotence, it helps to know the basics about how an erection develops, along with potential problems that get in the way. Erections begin in the brain with a thought related to sexual desire. Then a chemical message travels from the brain to the penis. Blood flow to the penis increases as blood vessels leading to the reproductive system relax and allow for increased circulation.
If you can't take one of these oral medications, your physician may have you try Caverject (alprostadil for injection), a hormone that you inject into your penis using a fine needle, or Muse (alprostadil urogenital), a tiny suppository that you insert into the tip of the penis. Both of these will bring on an erection within five to 15 minutes without sexual stimulation.
Consider this: penicillin, the first successful antibiotic, was derived from molds that inhibit bacterial growth. Scientists had to figure out why the molds slowed bacteria, and refine the active ingredients. Using herbal supplements is somewhat like putting mold on a wound. It might help, a little, but it’s certainly not going to help as much as using penicillin.
If you search the Internet, you’ll find lists of specific foods that are supposed to be good for erectile dysfunction. We’ve researched this topic extensively, searching databases of clinical studies, and found no evidence that these foods provide significant benefits from men with ED. (We suspect that most of the sites on the web are simply copying lists from one another.)
As one of the world’s top cardiologists, Dr. Joel Kahn has treated thousands of patients using natural and food-based therapies. His goal is to prevent heart attacks, the #1 cause of death for both men and women. In addition to his practice saving lives as a cardiologist, he lectures around the world, appears on Fox News, The Doctors Show and Dr. Phil. Dr. Kahn is also the founder of GreenSpace Café, metro Detroit’s first plant-based restaurant and bar, and the author of multiple bestsellers including The Whole Heart Solution and The Plant-Based Solution. Joel Kahn
Ginkgo biloba. Ginkgo is an herb that is used in Chinese medicine that’s thought to improve blood flow. "Any ED treatment that improves blood flow may help," explains Dr. Harris. "An erection is just blood in and blood out." However, the evidence that ginkgo can improve blood flow in ED is limited, and most experts say the jury is still out. In addition, ginkgo can increase the risk for bleeding problems if combined with certain medications, such as warfarin (Coumadin).
There have been some studies to suggest that a placebo effect that improves ED may work for some men. One study found that men taking an oral placebo pill showed as much improvement in ED symptoms as men who took actual medication to improve ED. Conversely, men who were given therapeutic suggestions to improve ED did not see signs of symptom improvement.