A study published in the journal Fertility and Sterility that analyzed the effect of various fruit and vegetables on sperm quality discovered carrots had the best all-round results on sperm count and motility — a term used to describe the ability of sperm to swim towards an egg. Men who ate the most carrots saw improved sperm performance by 6.5 to 8 percent. The Harvard researchers attribute the boost to carotenoids, powerful antioxidative compounds in carrots that help the body make vitamin A.
Research indicates that some specific nutrients—from common vitamins to lesser-known plant extracts—have demonstrated positive effects on very specific aspects of penile performance. Eat This Not That! has rounded up the best examples of these superfoods. And make your little guy look bigger by flattening your belly! After reading this, don’t miss these best foods for sexual stamina!
Ginkgo biloba. Known primarily as a treatment for cognitive decline, ginkgo has also been used to treat erectile dysfunction -- especially cases caused by the use of certain antidepressant medications. But the evidence isn't very convincing. One 1998 study published in the Journal of Sex & Marital Therapy found that it did work. But a more rigorous study, published in Human Pharmacology in 2002, failed to replicate this finding. "Ginkgo has come out of fashion in the past few years," says Ronald Tamler, MD, assistant professor of medicine and codirector of the men's health program at Mount Sinai Medical Center in New York City. "That's because it doesn't do much. I can say that in my practice, I have not seen ginkgo work -- ever."
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)

Other factors that “stress” the body can also increase your risk for ED. These include: substance abuse, using marijuana, smoking cigarettes, depression, anxiety and low self esteem. Cigarette smoking — or using nicotine — leads to constricted blood vessels, which has negative effects for sexual health. Other mental/emotional obstacles can cause less desire for sex and decrease testosterone. Several ways to help manage stress include:

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.
During sexual stimulation, sexual thoughts, or nocturnal erections, the neurotransmitter nitric oxide (NO) is released from the endothelial cells and the parasympathetic nerve terminal causing relaxation of two cylinder-like muscles called the corpora carvenosum. Nitric oxide influences an increase in concentrations of cyclic guanosine monophosphate (cGMP), which after numerous pathways triggers smooth muscle relaxation, and simultaneous closing of small veins traps blood in the cavernosal muscles, keeping blood in the cavernosal tissues that cause and maintain an erection.
For obvious reasons, ED can be a sensitive subject, one that until relatively recently men were more likely to try to hide than to deal with. Fortunately, a deeper understanding of the variety of causes of erectile dysfunction has led to medications, therapies, and other treatments that can be more individualized and more likely to be effective—and more open discussion about addressing the concern.
Issues relate to 'autoimmune type manifestations, joint pains, fatigue issues, rashes, sun-sensitivity, erectile dysfunction,libido issues, lack of energy and motivation, dry eye and sjogren's like symptoms, neuropathy for some, insomnia, etc. Any potential medications, therapies, or ways to approach these problems will be explored with great interest. Other questions involved 're-treatment' for relapsers, and issues around optimal dosing, and the role of Ribavirin.
The lack of strong scientific proof that vitamin supplementation can improve erectile function doesn’t stop companies from selling vitamins, herbal supplements, and other products with the promise that they will do the job. ED is often treatable with prescription medications or medical procedures, so be careful not to get taken by a manufacturer’s empty promises.

Erectile dysfunction (ED) is commonly called impotence. It’s a condition in which a man can’t achieve or maintain an erection during sexual performance. Symptoms may also include reduced sexual desire or libido. Your doctor is likely to diagnose you with ED if the condition lasts for more than a few weeks or months. ED affects as many as 30 million men in the United States.
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