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.
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. 
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.
According to Daneshgari, "Your best bet is to eat a healthy diet that is good for your heart and your circulation." Other foods that are good for your circulation include cranberries, apples, peanuts, onions, tea, and red wine. Chances are, if you take good care of your vascular health, you will avoid many of the common causes of erectile dysfunction.
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:
Peanuts contain a trove the amino acid L-arginine, which is one of the building blocks of nitric oxide, which aids your efforts under the covers. They also help reduce cholesterol levels. The less cholesterol you have in your system, the easier it is for blood to circulate throughout your body and down, which can help you maintain a firmer erection longer.
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.
A daily dose of niacin improves erectile function, particularly in men with high cholesterol, according to a 2011 study in The Journal of Sexual Medicine. The vitamin helps increase blood flow and reduce inflammation—one of the underlying causes of both high cholesterol and erectile dysfunction. “Vitamin B3 is also used to make sex hormones and other important chemical-signal molecules,” says Fisch. Like many of the others on our list, this tablet is most powerful when taken in conjunction with others: A cocktail of propionyl, L-carnitine, L-arginine, and niacin taken for three months improved 40% of erections in a study from researchers at Sapienza University of Rome in Italy.
In addition to being leaner and lower in calories than conventional cuts, grass-fed beef offers a host of benefits, from muscle-building to fat-burning to heart protection. You can add assistance in the bedroom to its list of good qualities; it’s an excellent source of Vitamin B12. A recent report from Harvard University highlighted a study that has linked low levels of B12 to erectile dysfunction. So, eat up! Bonus: It’s one of the healthy fats that actually makes you skinny.
For example, you’ll often hear that watermelon is a great remedy for ED. This belief seems to come from a study done in 20075, which showed that consuming watermelon could raised levels of L-arginine in the bloodstream. L-arginine is used in the production of nitric oxide (NO), which is a key to healthy erections (see our article, “How Do Erections Work“). However, the study did not show that consuming watermelon actually improved erections. Also, the subjects consumed the equivalent of three eight-ounce glasses of watermelon juice per day!
If you have symptoms of ED, it’s important to check with your doctor before trying any treatments on your own. This is because ED can be a sign of other health problems. For instance, heart disease or high cholesterol could cause ED symptoms. With a diagnosis, your doctor could recommend a number of steps that would likely improve both your heart health and your ED. These steps include lowering your cholesterol, reducing your weight, or taking medications to unclog your blood vessels.