Evidence from 5 randomized studies published in the years between 2004 and 2010, has demonstrated strong evidence that aerobic exercise can benefit people with arterogenic ED. These review results of this study build on and update the evidence from studies that concluded that concluded that exercise was beneficial for people with ED and cardiovascular disorders (25–27); on ED and obesity (18) and on normal subjects with ED (24). However, studies have shown common pathway for ED, cardiovascular (28 –30) and metabolic disorders (19, 31).
It’s important to note that high levels of zinc can reduce available copper in the body and affect iron levels. High levels of zinc can also interfere with different kinds of medications. Though it is estimated that 40 milligrams of zinc supplement are safe for men to take daily, there is no long-term research into the effects that this practice could yield.
In a study with human subjects, Kruger et al. have reported that acute changes in the normal physiological levels of PRL led to a significantly prolonged ejaculatory latency, but minor reductions of sexual drive and function. Although zinc induced elevation of PRL was not an acute effect, findings similar to the human study (prolongation of ejaculation and mild reduction of libido index with medium dose of zinc) were observed in this study. However, the prolongation of ejaculatory latency may not be merely due to effects of elevated PRL because elevated PRL levels are known to be associated with the negative aspects of sexual activities (decreased sexual desire and frequency of sexual intercourse).