Studies of mixed organic causes for erectile dysfunction showed varied results;15,16 thus, certain guidelines recommended that it not be used to treat erectile dysfunction.17 Side effects occurred when a high dose was given.18 Patients with organic erectile dysfunction had mixed results, with positive effects in 26,19 33,20 3421 and 43%,22 respectively. The results were better when the dose was doubled.20,21 Several meta-analyses showed a slight positive effect of yohimbine compared with placebo.23,24
In addition, when research has shown a nutrient such as zinc or niacin to improve sexual function, it's usually in people who are deficient in it. So, before you stock up on over-the-counter nutritional supplements for ED, speak with your doctor. He can test you for deficiencies and steer you toward the most effective and safest way to treat your erectile dysfunction. 

Important Caution: Before choosing Yohimbe be sure to let your doctor know you are interested in using this herb. Yohimbe should not be use in those people with low blood pressure or who are on blood pressure medications. Never exceed the dosage of this herb. Not to be taken at the same time you eat cheese, liver or red wine, all of which contain the amino acid tyramine. In addition, there have been many reports that French and American Yohimbine products did not actually contain any yohimbe, but caffeine instead. Before choosing to purchase any Yohimbe product, be sure that it is from a reputable, high-quality source. Never exceed suggested dosage of Yohimbe, as it may be toxic in high doses. Always follow the guidelines on the label of the product you have purchased.
In the Hong Kong study, the researchers postulated that niacin might be as beneficial as statins on erectile function, and have other related benefits too. Niacin is known to produce a flushing effect (see “Toleration Despite Adversity,” above), which is related to prostaglandin D2 (PGD2) release in the skin. This can lead to vasodilation and concomitant flushing. The production of PGD2 can also occur in macrophages, a type of protective white blood cell. Consequently, when PGD2 production is induced by niacin, it may affect all body tissue, including the cavernosal tissue in the penis. Indeed, PGD2 is one of the potential agents causing the vasodilation and engorgement of cavernosal tissue, thereby leading to erection. Thus, niacin improves erectile function by stimulating the production of PGD2.
Yohimbe A number of clinical trials have shown that the primary component of this bark from an African tree can improve sexual dysfunction associated with selective-serotonin reuptake inhibitors (SSRIs) used to treat depression. This herb has been linked to a number of side effects, including increased blood pressure, fast or irregular heartbeat, and anxiety. Yohimbe shouldn't be used without a doctor's supervision.
The key to all of this is the endothelium, the inner lining of blood vessels that helps blood flow smoothly. Regular exercise has been shown to improve the way the endothelium works. The endothelium lines the blood vessels in the heart and the penis, explains Dr. Hellstrom, but the blood vessels in the penis are about one-third the size of those in the heart. So if you fail to have erections due to vascular problems, that indicates that you’re at risk for heart problems as well.

How it works: Magnesium makes it harder for your testosterone to bind onto proteins and allows for more of it to remain “free” in your bloodstream – which is exactly how you want it to be for a higher sex drive. Higher levels of free testosterone makes for more desire. Magnesium also combats anxiety and prevents depressive feelings, helping you enjoy yourself more.
Thirty two male rats were randomly assigned to four groups and submitted to one of the following daily treatment regimens: (a) 1 mg of ZnSO4 dissolved in 1 ml of distilled water. (b) 5 mg of ZnSO4 dissolved in 1 ml of distilled water (c) 10 mg of ZnSO4 dissolved in 1 ml of distilled water. Controls were provided with 1 ml of distilled water. Supplementation was done orally using a feeding tube. These daily regimens were continued for two weeks (daily at 17.00 hours) and housed two per cage.

Many prostate problems, including cancer, are linked to zinc deficiency, and when the Chicago Center for the Study of Prostatic Diseases gave 50 to 100mg of zinc daily to patients suffering from infection of the prostate, 70 per cent of cases showed improvement. Zinc levels decline with age and men over fifty can fight impotency and prostate enlargement by taking zinc supplements.
In addition, when research has shown a nutrient such as zinc or niacin to improve sexual function, it's usually in people who are deficient in it. So, before you stock up on over-the-counter nutritional supplements for ED, speak with your doctor. He can test you for deficiencies and steer you toward the most effective and safest way to treat your erectile dysfunction. 

Although not every study has shown that yohimbe can have slimming effects, certain other studies have found positive results. One study found that yohimbine significantly increased mean weight loss in overweight female patients following a low-energy diet. (12) Possible mechanisms of action include: boosting lipolysis (the breakdown of fats and other lipids by releasing fatty acids into the blood) both during and following exercise, regulating insulin secretion, and reducing appetite. (13)


Several studies have shown that erectile dysfunction is somehow linked to problems with cardiovascular health — which one comes first has been the question. It makes sense; the penis becomes erect through a complex system of blood vessels and spongy tissue called the corpora cavernosa — this is where the blood gets trapped, causing the erection. When problems arise through this system, whether they’re caused in the brain or through problems with the blood vessels, the penis can’t get erect.
Another study discovered that nicotine significantly reduced participants' physical arousal in response to erotic films; the erections achieved by study participants who had ingested nicotine were 23% smaller than those who hadn't. This is in spite of the fact that participants didn't report feeling any less psychologically aroused by the erotic films.
The HSE recommends that adults should complete 30 minutes of moderate intensity activity such as brisk walking or gentle cycling at least five days a week. If you’re new to exercising this is a good place to start – particularly if you are in poor health or are overweight. The longer you keep up your exercise plan, the more activity you can add to it; just remember not to put too much strain on yourself too early. For more help, here’s our guide to starting out.

Carlo Adrian Cañon is a graduate of Bachelor of Secondary Education major in English from Southern Leyte State University-Tomas Oppus in the Philippines. He has written numerous articles on a variety of topics on men’s health, fitness, and product reviews. He is contributing to consumerhealthdigest.com for men sexual health category. You can follow him on: LinkedIn.

However, for most men who experience erectile dysfunction, their overall experience can be improved even further through regular exercise. There are many reasons why exercise improves sexual satisfaction. For one thing, regular, sustained exercise can lead to the release of chemicals called endorphins that are responsible for the so-called runner’s high, and which stimulate the release of sex hormones. Exercise also generally improves mood and imparts a sense of calm afterward, with lower heart rate, lower blood pressure, better digestion, and lower levels of stress hormones.
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Although not direct proof of cause and effect, the positive results that we report in half of the men in the current study may reinforce our clinical observation with objective RigiScan™ data that use of yohimbine might be associated with better effects in nonsmokers. We30 reported that cessation of smoking may rapidly improve nocturnal erectile activity and found that nicotine was not the noxious agent in our study. We postulated that carbon monoxide might create a hypoxic environment in the penis. This effect probably was mediated through restoration of nitric oxide activity.31
Stimulant drugs speed up the nervous system. By speeding up the nervous system, stimulant medications can make you feel jittery and speed up your heartbeat. Yohimbe might also speed up the nervous system. Taking yohimbe along with stimulant drugs might cause serious problems including increased heart rate and high blood pressure. Avoid taking stimulant drugs along with yohimbe.
In the end, the data from the Hong Kong study suggest that niacin alone can improve the erectile function of subjects with dyslipidemia suffering from ED. This is the first time this conclusion has appeared in the literature. Once again, the effect of niacin is clinically significant in those with moderate to severe ED. Further, because of the close relationship between ED and dyslipidemia, niacin could prove to be an important therapy for managing both conditions. Who knows? There may even be other benefits. Future studies will further refine the indications and benefits of niacin in patients with ED.
Could the bark of a tree actually increase libido and improve impotence? Well yes it can… Yohimbe bark (Pausinystalia yohimbe), one of the most popular herbal remedies for male sexual dysfunction, has been shown in studies to increase blood flow to the genitals of both men and women, proving to be helpful for those with low libido. Though Yohimbe can be used by women, its actions have been shown to be extremely supportive for men experiencing erectile dysfunction due to stress or as a side effect of physiological health issues.
The positive response in our patients was enhanced with the higher dose of yohimbine, a phenomenon noted previously.20,21 We agree that several weeks of therapy are needed before clinical effects are seen,21,22 and that some responders may be able to take yohimbine only on demand before sexual activity.39 Yohimbine is effective in a subset of men with organic erectile dysfunction, especially nonsmokers, and it deserves a place in our therapeutic armamentarium. When yohimbine is ineffective alone, it may be useful in combination with other treatment modalities, as has been shown with naloxone39 or trazodone.40
The number of animals ejaculating within 15 minutes was significantly reduced in 5 mg zinc treated group (one out of eight). However, all intromitted rats ejaculated between 20-30 minutes when observation was continued. Ejaculatory latency was significantly high in this group compared to controls; 711.60 Sec (SEM 85.47) vs. 489.50 Sec (SEM 67.66), P < 0.05. Similarly, they showed a significantly higher frequency of penile thrusting compared to controls; 26.50 (SEM 6.17) vs. 52.80 (SEM 11.28), P < 0.05 [Table 1].
Although not proven, it is likely that erectile dysfunction can be prevented by good general health, paying particular attention to body weight, exercise, and cigarette smoking. For example, heart disease and diabetes are problems that can cause erectile dysfunction, and both are preventable through lifestyle changes such as sensible eating and regular exercise. Furthermore, early diagnosis and treatment of associated conditions like diabetes, hypertension and high cholesterol may prevent or delay erectile dysfunction, or stop the erectile dysfunction from getting more serious.
All hormone determinations were performed by radioimmunoassay using kits provided by commercial suppliers. All blood samples were drawn between 8 am and 1 pm, quickly spun down, frozen, and then stored. All determinations were performed at the same time after the end of the study. The serum LH kit was obtained from Nichols Institute (now Quest; Tarzana, CA, USA) (normal male range, 1.4–11.1 mIU/ml). The serum free testosterone kit was obtained from Diagnostic Products Corporation (DPC, Los Angeles, USA) (normal male range, 15–40 pg/ml). The serum cortisol kit was bought from DPC (normal morning range, 10–24 mcg/dl; normal afternoon range, 5–12 mcg/dl). The serum dehydroepiandrosterone sulfate kit was obtained from DPC (normal range, 150–350 mcg/dl from adolescence to the peak at age 50 y, with a progressive decrease with advancing years).
Testosterone levels did not differ statistically in the treatment groups and did not change during treatment with yohimbine. The levels of dehydroepiandrosterone and free testosterone tended to be higher in the responder group, but the levels in both groups were well into the age-adjusted normal ranges. Androgens play a part in peripheral erectile activity, but they are not necessary for the central arousal stimulation of yohimbine,36 in which norepinephrine release acts as an inhibitor antagonist.2 Peripheral sympathetic stimulation also occurs37 but less than its adrenergic antagonistic activity. These peripheral effects are prompting the search for new alpha-2 adrenergic antagonists38
That said, I think that guys like myself who eat a ton of plant foods have to be consider the fact that they may not always be getting all the niacin they could.  Men with lower niacin status can probably give their erectile strength and cardiovascular health a nice boost by consuming more niacin-rich plant foods.  There are many plant foods, such as broccoli and mushrooms that are quite high in niacin.  I actually consume nutritional yeast and BPA-free sardines daily and get a nice amount of niacin this way on top of my regular diet.  Therefore, I feel that I am likely maximizing my erectile strength by combining the best of both worlds, i.e. some NO-boosting plant foods and high niacin foods as well.  (Both  sardines and nutritional yeast also have a decent amount of protein as well, which is important to me since I enjoy lifting weights.)
One study found that sticking to a Mediterranean diet rich in virgin olive oil, vegetables, fruits, whole grains, nuts, and fish was associated with a lower risk of ED development and improvement in people who already suffered from ED. There is also some evidence that vegetarian and vegan diets may lower the risk of some types of heart disease, which in turn decreases the likelihood of developing ED.
You may find that using a vacuum device requires some practice or adjustment. Using the device may make your penis feel cold or numb and have a purple color. You also may have bruising on your penis. However, the bruises are most often painless and disappear in a few days. Vacuum devices may weaken ejaculation but, in most cases, the devices do not affect the pleasure of climax, or orgasm.

In rare cases, the drug Viagra ® can cause blue-green shading to vision that lasts for a short time. In rare cases, the drug Cialis® can cause or increase back pain or aching muscles in the back. In most cases, the side effects are linked to PDE5 inhibitor effects on other tissues in the body, meaning they are working to increase blood flow to your penis and at the same time impacting other vascular tissues in your body. These are not ‘allergic reactions'.
I'll explain the best exercises for sex below. Know that if you suffer from PE or ED you also need to change the way you are thinking about sex to gain full control of yourself. Not just during sex, but in the lead up to sex as well, so you can reprogram your brain to achieve hard and in control. I explain this in the following video which is taken directly from my Sex Mastery program:
What's to know about erectile dysfunction? Erectile dysfunction (ED) is a condition in which a man regularly finds it difficult to get or keep a firm erection. ED can be caused by psychological, physical, and medical reasons. This article looks at many of the causes, symptoms, and treatment options, which include medication, surgery, exercise, and diet. Read now
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