While the study was not able to establish cause and effect, the trend rang true among overweight, obese and hypertensive men. Even though we saw a reduction in the prevalence of ED with men who were obese, overweight and hypertensive, that was not true of men with diabetes. Diabetes is one of the strongest risk factors for ED, so this was not surprising, the study s author Professor David Lopez said in a statement.So how does it work? Well, caffeine relaxes the muscles in the penis, which allows for increased blood flow and a stronger erection. The suggested biological mechanism is that caffeine triggers a series of pharmacological effects that lead to the relaxation of the penile helicine arteries and the cavernous smooth muscle that lines cavernosal spaces, thus increasing penile blood flow, the study says.Data for the study was sourced from the US National Health and Nutrition Examination Survey.According to Sexual Health Australia, erectile dysfunction affects around 1 million men in Australia.
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