"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.
Clinically I have seen these results in doses of just 20 mg twice daily.   It is important to note that prolonged zinc supplementation can lead to lowered copper levels so it is not advisable to continue this therapy unless it is in a cyclical nature.  For those on long term zinc there are combination products with Zinc and Copper.   In cases where some prescriptions that lower zinc are given, like acid lowering meds, thiazide diuretics and ACE inhibitors, or in renal dialysis patients, this chronic monitoring of zinc may lead to longer term supplementation.
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In the statistical analysis, the difference between the pre-test and post-test values (changed score) for IIEF score was computed. Student t-test was used to compare the mean changed score values of IIEF. All statistical analysis was performed on an IBM compatible micro computer using SPSS for window version 15.0, (Chicago IL, USA). The probability level for all the above tests was set at 0.05 to indicate significance.
The Florida Sexual History Questionnaire, a 20-item questionnaire that assesses interest and desire for sexual activity, sexual development, current sexual behaviors, and satisfaction with current sexual activity, was used to assess male sexual dysfunction. Individuals responded to each question by choosing one of six ordinally scaled response categories, with higher scores representing better functioning. Scores on the Florida Sexual History Questionnaire have been shown to significantly discriminate between men with and without impotence25 and between men with primary organic and primary psychogenic erectile dysfunction.26 According to Geisser et al,25 the Florida Sexual History Questionnaire has high internal consistency as well as split-half reliability. Chronbach's alpha has been reported to be as high as 0.90, and Spearman Brown's coefficient is reported to be 0.86.

Diet and lifestyle changes should come first when treating male sexual dysfunction. Any man experiencing erectile dysfunction should see a doctor right away to determine the cause and to diagnose any underlying health condition that may be contributing to this issue. Herbs can be a great way to support a man experiencing any type of sexual dysfunction. In the case of impotence, Yohimbe may be a great help support to the body when working to support a man through this very difficult reproductive issue.
The prolongation of ejaculatory latency may be beneficial when present with unimpaired arousability, penile erection and sex vigor. The ejaculatory latency can also be prolonged due to some disorders in the neuroendocrine or reproductive system.[24] But the duration of zinc supplementation in our study was only two weeks which is not long enough to have an impact on the neuroendocrine or reproductive system.
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But researchers emphasize that immediate-release niacin should remain as a treatment option for high cholesterol. "The point of our study is not that niacin should be avoided, but that the immediate-release preparation is the preferred form, and that medical supervision and evaluation are necessary for people taking this drug," said James McKenney, professor and chairman of the division of clinical pharmacy at the Medical College of Virginia.
Testosterone levels did not differ statistically in the treatment groups and did not change during treatment with yohimbine. The levels of dehydroepiandrosterone and free testosterone tended to be higher in the responder group, but the levels in both groups were well into the age-adjusted normal ranges. Androgens play a part in peripheral erectile activity, but they are not necessary for the central arousal stimulation of yohimbine,36 in which norepinephrine release acts as an inhibitor antagonist.2 Peripheral sympathetic stimulation also occurs37 but less than its adrenergic antagonistic activity. These peripheral effects are prompting the search for new alpha-2 adrenergic antagonists38

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.
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