Yohimbe is an herbal remedy that comes from the bark of an African tree, Pausinystalia yohimbe. Before Viagra, drugs containing yohimbine hydrochloride, the active ingredient in yohimbe bark extract, were used to treat erectile dysfunction (ED). However, levels of yohimbine in yohimbe bark extract vary considerably and are often very low. Yohimbe bark extract, by itself, never has been shown to work as effectively as drugs containing yohimbine hydrochloride. What’s more, yohimbe can have serious side effects including paralysis, fatigue, stomach disorders, even death. I don’t recommend it, and harvesting of its bark is driving the yohimbe species to extinction.

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

"The good news is, our study also found that a large proportion of men were naturally overcoming erectile dysfunction issues. The remission rate of those with erectile dysfunction was 29%, which is very high. This shows that many of these factors affecting men are modifiable, offering them an opportunity to do something about their condition," Professor Wittert says.


Test was terminated after 15 minutes of observation or after ejaculation (whichever occurred first). Ejaculatory latencies were taken as 15 minutes when animals showed intromissions but failed to ejaculate during the test period. After analyzing the results, the following tests were performed with the group that indicated significantly positive effects compared to the controls:
Dealing with erection problems can be a challenge. However, there are lots of treatments and lifestyle changes which can help. While medications such as Viagra improve symptoms in the short term, pelvic floor exercises can help you improve your sexual function in the long term. Find out why pelvic floor, also known as Kegel exercises, can be used to treat ED and how to perform the exercises correctly.

Some medical self-help books make niacin sound like a panacea for health-conscious people with rising cholesterol levels and shrinking budgets. Because this B vitamin is cheap and sold over-the-counter at drug and health food stores, people see no reason to check with the doctor before tossing back a handful of pills. What they may not know is that the high doses (1,500-3,000 mg) needed to lower cholesterol levels can cause serious complications. (As a dietary supplement, 10-20 mg is usually recommended). To add to the confusion, niacin comes in two forms: immediate- and sustained-release preparations.

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.
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Suggested intake: “The problem with yohimbine is that you can’t regulate the amount in a dosage,” says Fratellone. “It all depends on what part of the tree it comes from, how it’s cultivated, how it’s exported, and so on. The amount of extract you get will vary.” FDA researchers analyzed a number of over-the-counter yohimbe bark products. They found that the supplements contained only seven percent or less of the amount of yohimbine that would be found in actual yohimbe bark, which suggests that they contained little or no yohimbe. However, the prescription form of yohimbine is strictly regulated by the FDA. It is approved only for the treatment of impotence, and is available in tablets and capsules. For erectile dysfunction, 5.4 to 10 milligrams three times daily has been studied and regarded as generally safe.
Penile implants - are generally used if physical damage (like an accident) makes the anatomical parts needed for an erection not work. These are inserted by surgery and can provide a permanent treatment choice if others fail to work. The implants can be semi-rigid or inflatable. They can be pretty expensive and are not usually available on the NHS.
a) Some Vegetarians and Vegans.  It should be pointed out that certain animal-based foods are known for being the highest providers of niacin. So does this mean that animal-emphasized diets will result in increased blood flow over vegetarians?  My experience on the Peak Testosterone Forum has been the opposite and this is the subject of my book The Peak Erectile Strength Diet. Basically, a great many plant foods directly stimulate nitric oxide and will increase blood flow while lowering blood pressure. In fact, some plant foods can lower blood pressure as much as modern hypertension medications. See my page on Flaxseed and Blood Pressure for an example of that. High nitrate foods, such as spinach, arugula and beets, are yet another example.
Intermountain Healthcare is a Utah-based, not-for-profit system of 23 hospitals, a Medical Group with more than 1,600 physicians and advanced practice clinicians at about 180 clinics, a health plans division called SelectHealth, and other health services. Helping people live the healthiest lives possible, Intermountain is widely recognized as a leader in clinical quality improvement and in efficient healthcare delivery.
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.

The final study we will be examining in this article took a novel approach to by dosing 16 healthy male subjects with 7.7 milligrams of yohimbine tartrate and 6 grams of L-arginine glutamate and comparing it to a placebo. Depending on their group each subject was randomly assigned to consume the placebo one week and the novel compound the other week.


If you’ve been to the health food store lately, you’ve seen shelves lined with vitamins and “organic” supplements, each claiming to boost immunity, revitalize organ function, or “promote health.” And it’s working. Supplements are currently a $30 billion industry in the US, with more than 90,000 products on the market, and vitamin use is on the rise. In fact, a recent survey in Journal of American Medicine Association showed that “52% of US adults reported use of at least 1 supplement product.”
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