Nocturnal penile tumescence and rigidity monitoring using tumescence and rigidity activity units measure the area under the curve of activity divided by the time slept so that varying sleep times may be compared. All four parameters of base and tip tumescence and rigidity rose more in responders than in nonresponders (Table 5). Most changes showed either a trend toward significance or achieved statistical significance. Baseline tip rigidity activity units and tip tumescence activity unit scores differed significantly between groups (P=0.038 and P=0.026, respectively). In fact, nearly all of the baseline values were higher in the responders compared with the nonresponders. Responder tip tumescence activity unit scores increased steadily, whereas nonresponder scores dropped negligibly with the 10.8 mg tid dose. Responders had a significantly higher final score while taking the 10.8-mg dose (P=0.010). Responder tip rigidity activity unit scores also increased steadily, whereas nonresponder scores increased at the second dose, then fell again at the final dose. The mean tip rigidity activity unit score of the responders was significantly higher than that of the nonresponders with the 5.4-mg tid dose (P=0.011). The final scores of the responders were almost twice those of the nonresponders as well (significant where P=0.041). Base rigidity activity unit scores did not differ significantly between the two groups, although the increased responder scores with the initial dose of yohimbine was greater than that of the nonresponders (trend where P=0.065). Finally, base tumescence activity unit scores of the responders who were taking high doses of yohimbine were significantly higher (P=0.009).
Much of the evidence shows high rates of vitamin D deficiency in patients with erectile dysfunction. In fact, one study of 3,400 participants found that men with vitamin D deficiency were 32% more likely to have trouble with erections when all other risk factors were controlled for. It’s a little on the nose that you need vitamin D for your “D,” but hey—science can be funny too.
When it comes to keeping your gut healthy and immunity strong, consuming fermented foods and probiotic supplements is essential. Probiotic foods and supplements fortify the ‘good’ bacteria that live in the gut – the all-important microbiome – which in turn protects the gut wall, regulates inflammation, and assists with hormone and neurotransmitter production. Also essential… View Article
Our bodies are designed to be active and in motion. By keeping active and engaging in regular aerobic exercise, you increase the blood flow to your muscles, and your penis along the way. One of the most interesting things about increasing your blood flow is that it becomes a signal to your blood vessels to grow and get wider. It benefits your brain, your heart, and your erection. The principle of "use it or lose it" is the best advise one can follow. In fact, if you don't engage in sexual activity at least once or twice a week, it would be beneficial to masturbate. This not only helps with prostate health, but encourages the blood vessels that contribute to your erection to maintain their patency and flow. 
On the other hand, high zinc levels have negative effects on sperm quality. Excessive zinc intake in mice have indicated a negative effect of increasing doses of zinc on sperm count and motility.[5] Although there have been studies focusing on various aspects of zinc related reproductive functions, studies on zinc related sexual behavioral aspects have received scant attention. In one study, intranasal irrigation with zinc sulphate has been reported to completely abolish the sexual behavior of male rats.[6]
Two years ago I took regular Niacine for about a year to lower LDL and increase HDL. I did not want to take Statins because of its side effects. I was being monitored by my Dr. because of the effect on liver enzymes. I took 1.5 gr together with Phytosterols. The treatment was effective and the only side effect were the flushes which I found could be eliminated by having 500 mg at the end of each of the 3 main meals. I stopped treatment for a year or so, but now the Dr. suggested I start taking Niacine. or Statins. I chose Niacine (Nicotine Acid) and started with 500 mgs for 3 days; increased it to 1000 mgs. for 4 more days, until I increased it to 500 mgs x 3 for a total of 1.5 grms/day taking 500 mgms/meal. I started noticing my gradual decrease in libido this time almost inmediately. I do not take any other medicines as such I'm definitely inclined to blame Niacine because I have taken Phytosterols for 3 years and my libido was fine. I'm a senior. Hope this will help!
Three types of medications to treat erectile dysfunction -- sildenafil, vardenafil and tadalafil -- may cause low blood pressure. Niacin, used to treat conditions such as high cholesterol and hardening of the arteries, can also lower your blood pressure. If you take medications to treat male impotence, ask your doctor before combining it with niacin.

Yohimbe can interact with several drugs and medications, so it’s not safe for everybody to use. Don’t take yohimbe bark if you’re currently taking any ACE inhibitor drug, beta blocker, SSRI drug, MAOI, stimulants or caffeine-containing drugs, or tricyclic antidepressant drugs. Those who have any of the conditions listed below should not take herbal treatments like yohimbe without speaking with a doctor first. This is because it may affect things like blood pressure, heart health, kidney function and neurotransmitter functions:

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In addition, when research has shown a nutrient such as zinc or niacin to improve sexual function, it's usually in people who are deficient in it. So, before you stock up on over-the-counter nutritional supplements for ED, speak with your doctor. He can test you for deficiencies and steer you toward the most effective and safest way to treat your erectile dysfunction. 

A physical exam checks your total health. Examination focusing on your genitals (penis and testicles) is often done to check for ED. Based on your age and risk factors, the exam may also focus on your heart and blood system: heart, peripheral pulses and blood pressure. Based on your age and family history your doctor may do a rectal exam to check the prostate. These tests are not painful. Most patients do not need a lot of testing before starting treatment.
A study in the Journal of Sexual Medicine found that a large percentage of men with ED also have low levels of vitamin D. If you’re experiencing ED, you may want to have your level of vitamin D checked. Other symptoms of a low vitamin D level may be too subtle to notice. However, if you have serious vitamin D deficiency, you may have bone pain or muscle weakness. Vitamin D levels can be checked with a simple blood test and for most people corrected with a supplement.
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!
All hormone determinations were performed by radioimmunoassay using kits provided by commercial suppliers. All blood samples were drawn between 8 am and 1 pm, quickly spun down, frozen, and then stored. All determinations were performed at the same time after the end of the study. The serum LH kit was obtained from Nichols Institute (now Quest; Tarzana, CA, USA) (normal male range, 1.4–11.1 mIU/ml). The serum free testosterone kit was obtained from Diagnostic Products Corporation (DPC, Los Angeles, USA) (normal male range, 15–40 pg/ml). The serum cortisol kit was bought from DPC (normal morning range, 10–24 mcg/dl; normal afternoon range, 5–12 mcg/dl). The serum dehydroepiandrosterone sulfate kit was obtained from DPC (normal range, 150–350 mcg/dl from adolescence to the peak at age 50 y, with a progressive decrease with advancing years).
The HSE recommends that adults should complete 30 minutes of moderate intensity activity such as brisk walking or gentle cycling at least five days a week. If you’re new to exercising this is a good place to start – particularly if you are in poor health or are overweight. The longer you keep up your exercise plan, the more activity you can add to it; just remember not to put too much strain on yourself too early. For more help, here’s our guide to starting out.
If ED continues to be a problem even after making certain lifestyle changes, talk with your doctor. ED is an uncomfortable subject for many men to discuss, but it’s treatable in most cases, so there’s no reason to avoid getting help. Doctors see patients every day about ED, so you’re simply one of millions of men dealing with this common condition.

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.
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
Research is mixed on the effectiveness of acupuncture as an erectile dysfunction cure, but one study published in November 2013 in the Journal of Alternative and Complementary Medicine found that acupuncture can be beneficial for men experiencing erectile dysfunction as a side effect of antidepressants, including selective serotonin reuptake inhibitors (SSRIs) and serotonin noradrenaline reuptake inhibitors (SNRIs).
I'll explain the best exercises for sex below. Know that if you suffer from PE or ED you also need to change the way you are thinking about sex to gain full control of yourself. Not just during sex, but in the lead up to sex as well, so you can reprogram your brain to achieve hard and in control. I explain this in the following video which is taken directly from my Sex Mastery program:

Did you copy past all that information without research just to get your post count up? WTF! Your mixing the instant Niacin which is the best and the time release niacin which is THE TOXIC version of niacin because some fat ass pussy whiner did not like the flushing. The real Niacin has no significant side effects. If you take to much you feel nauseated and at those levels you are still WAY BELOW what would be considered toxic for your body. Niacin actually makes your erections harder and your penis slightly increases in size. If you are having a hard time getting it up, it's something else. I also strongly advise to take niacin just before bed time as it will lower your stamina. I do not fully understand why it does this. It has something to do with ity regulating the fats in your blood. Niacin is also a sleep aide.
Males consuming yohimbine HCL for its pro-erectile benefits should take 5.4mg to 6mg three times per day but don't expect for the results to be noticeable until after about two to weeks of consistent dosing. [4] Not all males will experience this benefit so if you do not notice a change after four weeks of consistent dosing then consider stopping supplementation altogether.

When experiencing difficulty in achieving an erection, it’s important to figure out if you are able to achieve an erection at all or if this happens only when you are with your partner. If you are unable to achieve an erection on your own, this may be more related to a medical and/or physical condition. Examples of this could include heart conditions, neuromuscular disorders, or pelvic pain. To evaluate if this is the cause of your condition, you should follow-up with your physician to examine your cardiovascular, neurological, and musculoskeletal system. From here, they may recommend medications such as Viagra or Cialis, or sometimes a referral to a urologist.
Cai, T., Verze, P., Massenio, P., Tiscione, D., Malossini, G., Cormio, L. ... Mirone, V. (2016, August 12). Rhodiola rosea, folic acid, zinc and biotin (EndEP®) is able to improve ejaculatory control in patients affected by lifelong premature ejaculation: Results from a phase I II study. Experimental and Therapeutic Medicine, 12(4), 2083-2087. Retrieved from https://www.spandidos-publications.com/10.3892/etm.2016.3595
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