Much of the evidence shows high rates of vitamin D deficiency in patients with erectile dysfunction. In fact, one study of 3,400 participants found that men with vitamin D deficiency were 32% more likely to have trouble with erections when all other risk factors were controlled for. It’s a little on the nose that you need vitamin D for your “D,” but hey—science can be funny too.
//cure-erectile-dysfunction.org and a clinic offering xcell treatment to many things as well as erectile dysfunction. i know what u r passing trough and my advice is to not stop life. keep on working/studying and try to live healthy as much as u can. i can tell ur body has the potential to heal itself but u have to give it right resources to use.. have good diet, stay away from smoking-alcohol, take vitamins, eat natural food as much as you can.
A 2011 study of 160 men with moderate or severe erectile dysfunction divided the group in two—80 men were given niacin supplements, and 80 a placebo. The group given niacin reported improved ability to “maintain an erection versus the control group.” It’s not exhaustive research, but still promising. The best part about niacin is that it’s naturally found in foods like turkey, avocado, and peanuts (yum). If you’re not a turkey sandwich fan, you can supplement with a vitamin B complex.
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6. Have you suffered from testicular atrophy? 7. Have you suffered from erectile dysfunction? 8. Do you experience pain in your penis? 9. If so, describe the pain. 10. Is there any one incident which you feel might have acted as the trigger for this condition? 11. Has the rate of shrinkage increased or decreased over the years? 12. Do you drink? 13. Do you notice any worsening of symptoms as a result of drinking? 14. Do you smoke? 15.
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).
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. 
In a 2005 study, three months of twice-daily sets of kegel exercises combined with biofeedback and advice on lifestyle changes, such as quitting smoking, losing weight, and limiting alcohol, worked far better than just giving the participants advice. “Wearing tight pants will affect impotence along with some other medical conditions like diabetes and heart disease,” which can also affect a man’s degree of impotence, Dr. Jennifer Burns, specializing in family practice with an emphasis on gastrointestinal health at the BienEtre Center, told Medical Daily.
If you bike a lot and have a very narrow saddle on your bicycle, consider switching to a "no-nose seat" which is wider at the back than a conventional saddle, allowing more of your weight to be distributed to the sitting bones. Make sure the seat is level or angled slightly downward and at a height that allows your knee to be just slightly bent at the bottom of the pedal cycle. Raising the handlebars on your bike so that you're sitting upright may also help.
Research is mixed on the effectiveness of acupuncture as an erectile dysfunction cure, but one study published in November 2013 in the Journal of Alternative and Complementary Medicine found that acupuncture can be beneficial for men experiencing erectile dysfunction as a side effect of antidepressants, including selective serotonin reuptake inhibitors (SSRIs) and serotonin noradrenaline reuptake inhibitors (SNRIs).