Yohimbine. This chemical is found in the bark of an African tree called yohimbe. It has been used as a male aphrodisiac in Africa, and under medical supervision it has been used as a prescription drug to treat ED. Supplements made from yohimbe bark are also available without a prescription, but they can be life-threatening if used at high doses, according to the Natural Medicines Comprehensive Database. The supplement can interact in a harmful way with certain drugs, such as blood pressure medications, and should be avoided by anyone with liver, kidney, heart, or diabetes problems or problems with anxiety or depression. Like DHEA, yohimbine should not be taken without a doctor's supervision.
When considering vitamin supplementation for erectile dysfunction, one of the first vitamins that you may come across in literature would be Vitamin D. This is a vitamin that can be easily obtained through many types of dairy products like milk, cheese, and yogurt and is also in abundance if you live in a tropical climate. Sunlight is able to give us a natural dose of vitamin D daily.  Although vitamin D is usually associated with improving bone strength and prevention osteoporosis, another valuable feat of vitamin D is the fact that it helps reduce atherosclerosis. Studies confirm that there is a similar underlying mechanism that occurs between conditions like cardiovascular disease and erectile dysfunction. As blood vessels are damaged and filled with plaques, the diameter for blood to flow through is gradually reduced. After a few years, the amount of blood may be reduced substantially. Vitamin D is able to help activate cells that remove some of these dangerous plaques and delay the onset of ED. 
The penile roots are enveloped by two pelvic floor muscles, the bulbocavernosus (BC) and the ischiocavernosus (IC). The IC muscle is the “erector muscle” and the BC muscle the “ejaculator muscle.” The BC and IC muscles are responsible for the ability to lift one’s erect penis up and down (wag the penis) as they are contracted and relaxed. Although not muscles of glamour, they are certainly muscles of “amour.” Although unseen and behind-the-scenes, hidden from view, these often unrecognized and misunderstood muscles have vital functions in addition to erection and ejaculation. When the pelvic floor muscles are not functioning optimally, one loses the potential for full erectile rigidity. Like other skeletal muscles, they can undergo “disuse atrophy,” becoming thinner, flabbier and less functional with aging, weight gain, sedentary lifestyles, poor posture, chronic straining and other forms of trauma, including pelvic surgery (e.g., prostatectomy). Exercising them can enhance sexual health; maintain sexual health; help prevent the occurrence of ED in the future; and help manage ED. Specifically, pelvic floor exercises can be beneficial with respect to the following spectrum of issues: ED; ejaculation issues including premature ejaculation; urinary incontinence; overactive bladder; post-void dribbling; and bowel urgency and incontinence. One of the challenges of pelvic floor training is that most men do not know where their pelvic muscles are located, what they do, how to exercise them, and what benefits exercising them may confer. In fact, many men don’t even know that they have pelvic floor muscles. Because they are out of sight, they are often out of mind and not considered when it comes to exercise and fitness. However, although concealed from view, they deserve serious respect as they are responsible for vital functions that can be enhanced when intensified by training. Pelvic floor muscle training before and after prostate cancer surgery can facilitate the resumption of urinary control and sexual function after surgery. Pelvic floor training is also useful for men who suffer with stress urinary incontinence following prostatectomy. This is a spurt-like urinary leakage that occurs at times of increased abdominal pressure, such as with sports and other high impact activities. Pelvic floor contractions on demand are a technique in which the pelvic muscles are braced and briskly engaged at the time or just before any activity that triggers the stress incontinence. When practiced diligently, this can ultimately become an automatic behavior and the incontinence improved, if not resolved.
Do not exceed 1 capsule in 24 hours. This is only intended for those 18 and over. Do not use if you are pregnant, nursing, or intend on becoming pregnant. If you have any current heart issues, such as but not limited to, hypertension, heart disease, and high cholesterol do not use. If you have any other medical issues such as prostate cancer and prostate enlargement do not take. Do not take this product if you're on any medications such as MAOI's or nitrates. Consult with your physician or health care provider to using the product.
In fact, one common reason many younger men visit their doctor is to get erectile dysfunction medication. Often, men with erectile dysfunction suffer with diabetes or heart disease, or may be sedentary or obese, but they don’t realize the impact of these health conditions on sexual function. Along with erectile dysfunction treatment, the doctor may recommend managing the illness, being more physically active, or losing weight.