If never, the problem is likely to be physiological; if sometimes (however rarely), it could be physiological or psychological. In both conditions, an intact neural system is required for a successful and complete erection. Some of the most popular herbs available on the market today are Tribulus, yohimbe, ginkgo biloba, and others. The former uses the peripheral nerves and the lower parts of the spinal cord, whereas the latter uses the limbic system of the brain. This type of device is sometimes referred to as penis pump and may be used just prior to sexual intercourse.
To date, its effects on treating impotence and other sexual dysfunctions have been extensively studied. These studies showed that Tribulus helps treat impotence caused by low testosterone levels or an imbalance in the body's level of sex hormones. As testosterone and other male sex hormone levels start to drop after reaching middle age, low testosterone level is often the culprit in most intermittent impotence problems, especially in older men.
The man's comfort level is also frequently a factor, especially in maintaining an erection. The vacuum forces blood into the penis, which in turn causes an erection. Now it is also defined as the inability to maintain an erection or ejaculate. Once an erection is achieved, the man places the elastic ring on the base of his penis, which keeps blood from draining from the penis back into the body. Their absence may indicate a problem with nerve function or blood supply in the penis. Be sure to select a Tribulus extract that contains at least 45% protodioscin.. More drastically, inflatable or rigid penile implants may be fitted surgically. These studies showed that Tribulus helps treat impotence caused by low testosterone levels or an imbalance in the body's level of sex hormones. as Tribulus shows positive effects only after two to three months.