A study of 23 individuals found that a dose of 0.4mg/kg of yohimbine not only increased norepinephrine in the blood, blood pressure, and heart rate, but it also increases impulsive response rates. These response rates are measured by the number of impulsive errors, response biases, and reaction times on an immediate memory task.  While yohimbine may improve your reaction time it may also encourage you to act irrationally.
Yes, niacin is good for erectile dysfunction. Vitamin B3 or Niacin acts as a powerful agent to improve the condition of erectile dysfunction and a research study conducted in a medical center of Hong Kong confirmed that Niacin supplementation has resulted in the increase of blood flow across the pelvic region in men. In addition, researchers have further confirmed that the Vitamin comes with the ability to unclog various harmful fats collected in the artery region.
Before taking any medication for erectile dysfunction, including over-the-counter supplements and herbal remedies, get your doctor's OK. Medications for erectile dysfunction do not work in all men and might be less effective in certain conditions, such as after prostate surgery or if you have diabetes. Some medications might also be dangerous if you:
Cavallini, G., Modenini, F., Vitali, G., & Koverech, A. (2005, November). Acetyl-L-carnitine plus propionyl-L-carnitine improve efficacy of sildenafil in treatment of erectile dysfunction after bilateral nerve-sparing radical retropubic prostatectomy. Urology, 66(5), 1080-5. Retrieved from http://www.sciencedirect.com/science/article/pii/S0090429505006515
b) Men With Digestive Disorders. There are many, many GI disorders that plague modern, urban dwellers: atrophic gastritis, Crohn's, diverticulitis, enzyme deficiencies, IBS, ulcerative colities and on and on. All of these can lower vitamin and mineral absoprtion. Men struggling with these issues may very well benefit from increased amounts of niacin in the diet or possibly with supplementation.
A double-blind, partial crossover study on the therapeutic effect of yohimbine hydrochloride on erectile dysfunction was done in 82 sexually impotent patients. All patients underwent a multifactorial evaluation, including determination of penile brachial blood pressure index, cavernosography, sacral evoked response, testosterone and prolactin determination, Derogatis sexual dysfunction inventory and daytime arousal test. After 1 month of treatment with a maximum of 42.0 mg. oral yohimbine hydrochloride daily 14 per cent of the patients experienced restoration of full and sustained erections, 20 per cent reported a partial response to the therapy and 65 per cent reported no improvement. Three patients reported a positive placebo effect. Maximum effect takes 2 to 3 weeks to manifest itself. Yohimbine was active in some patients with arterial insufficiency and a unilateral sacral reflex arc lesion, and in 1 with low serum testosterone levels. The 34 per cent response is encouraging, particularly in a Veterans Administration population presenting with a high incidence of diabetes and vascular pathological conditions not found in regular office patients. Only few and benign side effects were recorded, which makes this medication worth an attempt, often as a first line of treatment even at a dose of 8 tablets.
Vitamins and minerals are used in systems all over the body. Everywhere from your cardiovascular to your nervous system. It’s a lot to understand. So to help dispel some of the myths and outlandish claims, we’ll take a look at how five common vitamins and nutrients affect one very specific aspect of men’s health—erections. Turns out, vitamins can do more than just ward off the common cold.
There are many different reasons a man’s ability to sustain or maintain an erection may be impaired. Impotence is the most common sexual disorder among men. It is thought that most men should be able to achieve and maintain an erection well into their 80s, but about 25 percent of all men over the age of 50 are thought to experience some form of impotence. By the age of 75, half of all men will be impotent. Impotence may come and go, depending on the state of their physical health as well as their stress levels. One of the number one causes of impotence is cardiovascular disease. Cardiovascular disease may restrict blood flow to the penile tissues, which greatly affects a man’s ability to achieve and maintain an erection during sexual arousal.
There’s a reason why Casanova developed his reputation: He was alleged to scarf two dozen oysters a day, which is the food highest in zinc. In the modern era, people with higher levels of zinc in their system have been shown to have a higher sex drive than those with lower levels. That’s because the mineral is essential for testosterone production. In one Nutrition study, zinc-deficient men who supplemented with zinc for six months doubled their T levels. And another eight-week trial published results in the Journal of the International Society of Sports Nutrition found that college football players who took a nightly zinc supplement showed increased testosterone levels as well.
The number of intromissions in the 5 mg/day group was comparable with controls. On the other hand number of penile thrusting was significantly increased with the same dose. These are indications of unimpaired erectile function due to supplemented zinc. Our observations also confirmed the lack of aberrant sexual behavior which is indicative of uninhibited penile tactile sensations. Sexual behavior may also be changed with motor weaknesses and incoordination. Supplementation with zinc did not impair muscle strength or coordination when tested with bar and bridge tests, indicating that prolongation of ejaculation was not mediated through these mechanisms.
Data from the Florida Sexual History Questionnaire collected at each time period (baseline, 5.4 mg tid and 10.8 mg tid) are presented in Table 6. Three patients (two responders and one nonresponder) did not complete the entire questionnaire for each study period and were excluded from the analyses. Thus, data in the table and statistical analyses are based on the responses of seven responders and eight nonresponders.
To locate the muscles these exercises engage, try to stop and restart the flow of urine mid-stream. Just do this once, because if you do it too much it can affect the passage of urine. Once you’ve located these muscles, you can tighten and draw the muscles in, feeling them lift upward. Hold for a count of five, then release. It’s recommended that men do 8 to 10 repetitions, resting in between. Ideally, each series of 8 to 10 should be followed by 5 to 10 quick squeezes and releases, and men should work up to doing the whole process four or five times per day for best results.
Past research has suggested that living a healthier life full of exercise and a good diet can bring men back to sexual health. But according to researchers at Cedars-Sinai Medical Center in Los Angeles, most of these studies underrepresented African-American men. “This study is the first to link the benefits of exercise in relation to improved erectile and sexual function in a racially diverse group of patients,” said senior author of the study Dr. Adriana Vidal, of Cedars-Sinai Samuel Oschin Comprehensive Cancer Institute and Department of Surgery, in a press release.
The vitamin-deficiency disease pellagra was first identified in 1735 by Spanish physician Gaspar Casal. Considered to be Spain’s first epidemiologist, Casal is famous for his clarity and independence of thought, along with his conceptual change in the approach to medicine. Instead of mere observation and reporting, Casal moved to a fact-based induction methodology, presaging the work of John Stuart Mill, the political philosopher, economist, and logician, one hundred years earlier.
Thank you for posting this. The exact same thing happened to me, My Dr. recommended Niacin to reduce LDL and increase HDL. Trouble is I noticed my sex life really dropped quickly. Very rare to get and maintain an erection. I couldn't quite tell but it seemed to me the problems started a couple of weeks after I began the Niacin. Out of desperation I quit Niacin to see what would happen and suddenly the full and regular erectiions came back. Everything I read says the effect should be the opposite. Now I have to decide do a die earlier of heart disease and have more sex or better cholesterol control with a diminished and almost non-existent sex life. Pretty sure I'm gonna favor the sex life!
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
Can one of the B vitamins actually improve erectile dysfunction? The research makes a strong case that Niacin, a.k.a. Vitamin B3, does indeed do just that for a big percentage of men. Of course, this is a inexpensive help to erectile issues, as high niacin foods and supplements are cheap and readily available. Below I summarize the most prominent human evidence to date that shows which men will likely benefit and why:
There are so many potential reasons a man might develop erectile dysfunction (ED), it's nearly impossible to generalize the best ways to treat it. What works for one man may not work for another simply because they are having problems for different reasons. That said, it may encouraging to hear that there are a variety of options that may be considered, from psychological counseling to lifestyle changes, medications to treatments and devices.
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).
According to the Centers for Disease Control and Prevention, ingesting levels of zinc in excess of the recommended dietary amount will result in diarrhea, vomiting, and stomach cramps. The maximum amount of daily zinc consumption recommended is 40 milligrams per day. Symptoms of too much zinc intake include nausea and headaches. If you have reason to suspect you have ingested too much zinc, contact a medical professional.