The endothelium is vital to the maintenance of vascular health. It is a critical determinant of vascular tone and patency, reactivity, inflammation, vascular remodeling, and blood fluidity. (9, 10). Nitric oxide (NO) is the most potent vasodilator and is secreted by the endothelium. It is synthesized from Larginine by the endothelial enzyme NO synthase (eNOS). NO released in response to sexual stimulation relaxes penile vascular smooth muscle by increasing intracellular cyclic 3′, 5′-guanosine monophosphate (cGMP) concentration. Vasodilatation of erectile tissues allows the sinusoidal spaces to fill with blood resulting in the attainment and maintenance of an erection (5).
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.
Controlling stress, having a healthy diet, and getting enough sleep to create a good foundation for sexual satisfaction. But sometimes the basics aren’t quite enough. Millions of men experience erectile dysfunction (ED), but ED can usually be successfully treated with prescription medications like Viagra, Levitra, Staxyn, and Cialis. These drugs have helped men understand that ED isn’t all in their mind, have opened up the topic to a more honest discussion, and have transformed many men’s sex lives.
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.
Partner preference index in both 5 mg zinc treated group and controls was positive. In the control group, time spent by males, with estrous and diestrous females, was 21.75 sec. (SEM 2.26) and 13.62 sec. (SEM 1.05) respectively. In the zinc treated group they spent 20.87 sec. (2.09 SEM) with estrous and 14.37 sec. (SEM 0.70) with diestrous females. The PPI of controls and zinc treated group was 8.12 Sec. (SEM 2.32) and 6.50 Sec. (SEM 1.76) respectively. There was no significant difference between the two groups, P > 0.05.
The main surgical treatment of ED involves insertion of a penile implant (also called penile prostheses). Because penile vascular surgery is not recommended for aging males who have failed oral PDE5 inhibitors, ICI or IU therapies, implants are the next step for these patients. Although placement of a penile implant is a surgery which carries risks, they have the highest rates of success and satisfaction among ED treatment options.
Zinc distributes all over the body, so it’s difficult to test through a blood test. If you have problems with erectile dysfunction or suspect that you might have a zinc deficiency, talk with your doctor. A medical professional will be able to check your testosterone level and determine if using zinc supplements to treat your ED is an appropriate course of action.
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