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This study showed an association of eating lots of flavonoid rich foods (strawberries, blueberries, cherries, blackberries, red wine, apples, pears, and citrus products) and lower rates of erectile dysfunction. A higher intake of several flavonoids also reduces diabetes and cardiovascular disease risk. Keep in mind that erectile dysfunction is thought to be of vascular etiology (the cause) and so shares risk factors (such as hypertension, obesity, and smoking) with cardiovascular disease. Studies have shown that lifestyle factors such as plenty of exercise, being of normal weight, and a Mediterranean style diet rich in whole grains, fruit, vegetables, nuts, legumes, and olive oil was associated with both lower rates of erectile dysfunction and an improvement in erectile function in men. So don't focus just on the flavonoids, but on the whole lifestyle package. From Science Daily:

Blueberries, citrus fruits, red wine associated with reduced erectile dysfunction

Flavonoid-rich foods are associated with a reduced risk of erectile dysfunction -- according to a new collaborative study from the University of East Anglia (UEA) and Harvard University. Research published in The American Journal of Clinical Nutrition reveals that eating foods rich in certain flavonoids is associated with a reduced risk of erectile dysfunction in men, with the greatest benefit in those under 70. Of all the different flavonoids, Anthocyanins (found in blueberries, cherries, blackberries, radishes and blackcurrant), flavanones and flavones (found in citrus fruits) were found to offer the greatest benefits in preventing the condition.

It is already known that increased exercise can improve erectile function, but this research shows that eating a flavonoid-rich diet is as good for erectile function as briskly walking for up to five hours a week. The study also showed that a higher total fruit intake was associated with a 14 per cent reduction in the risk of erectile dysfunction. And that a combination of consuming flavonoid-rich foods with exercise can reduce the risk by 21 per cent.

More than 50,000 middle aged men were included in this large population based study. They were asked about their ability to have and maintain an erection sufficient for intercourse -- dating back to 1986. Data on dietary intake was also collected every four years.....More than one third of the men surveyed reported suffering new onset erectile dysfunction. But those who consumed a diet rich in anthocyanins, flavones and flavanones were less likely to suffer the condition.

Prof Cassidy said: "The top sources of anthocyanins, flavones and flavanones consumed in the US are strawberries, blueberries, red wine, apples, pears, and citrus products.""We also found that the benefits were strongest among younger men," she added. The team also looked at other lifestyle factors and found that men who consumed a high intake of anthocyanins and flavanones and who were also physically active had the lowest risk of erectile dysfunction.

Another excellent reason to exercise - for better erectile and sexual function in men! The researchers say that their research supports the idea that "that exercise might one day be prescribed as a treatment for erectile dysfunction".

And they're not talking about that much exercise: the highly active men in the study did a moderately intense activity such as brisk walking, cycling, or tennis at least an hour 3 to 4 times a week. Other research has suggested that erectile dysfunction can be reversed naturally by changing lifestyle factors see October 27, 2014 post Reversing Erectile Dysfunction Naturally). From Reuters:

Older men who exercise more have better erectile function

Men who exercise more have better erectile and sexual function, suggests a small study of older overweight men. The authors say their results support the idea that exercise might one day be prescribed as a treatment for erectile dysfunction.

Vidal and colleagues examined exercise habits and sexual function in 295 healthy men who were part of a research project evaluating prostate cancer risk at the Durham Veterans Affairs Medical Center in North Carolina. On average, the men were about 62 years old, and they were all overweight or obese. Roughly one third had diabetes or a history of chest pain or heart attacks. About three quarters were current or former smokers. Ninety-three men, or about a third of the group, were African-American.

Men were scored based on a measure known as metabolic equivalent of task (MET) hours per week and placed in four categories ranging from sedentary, with three or fewer MET hours/week, to highly active, with at least 18 MET hours/week. Most often, the men were sedentary, with 44 percent reporting little activity. But a substantial proportion, 26 percent, were highly active.Researchers also questioned the men about their sexual function, focusing on their ability to get erections and have orgasms, as well as the quality and frequency of their erections...Added up, responses could lead to a total score from 0 to 100....Men who reported more frequent exercise also reported higher sexual function scores. Half of the highly active men reported sexual function scores of at least 70, compared with a median score of about 33 for sedentary men.

SOURCE: bit.ly/1NilZYI The Journal of Sexual Medicine, online March 20, 2015.