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Those who suffer from erectile dysfunction (ED) need to consume something pretty simple. Berries.

These contain lots of flavonoids, which can bring down the risk of erectile dysfunction, according to researchers at Harvard T.H. Chan School of Public Health and the University of East Anglia.

"We already knew that intake of certain foods high in flavonoids may reduce the risk of conditions including diabetes and cardiovascular disease," lead study author Aedin Cassidy, a nutrition professor at UEA, said. "This is the first study to look at the association between flavonoids and erectile dysfunction, which affects up to half of all middle-aged and older men," according to scienceworldreport.

Their study involved 25,000 middle-aged and older men, who answered a number of questions related to sexual health and diet in the past two decades. The subjects had good health since the beginning of the research.

The scientists factored issues such as smoking, caffeine, weight and physical activity. They then found that flavonoids, or biochemical that lend their vivid colours fruits and vegetables, were linked to lower ED rates, especially when there was less physical activity.

Three specific flavonoids associated to this reduction including anthocyanins, flavnones and flavones.

Men consuming a lot of food with high levels of flavonoids had 10 percent less chance to suffer ED. Moreover, only a few portions of the foods could lead to remarkable improvement in ED, according to Cassidy via a news release. Cassidy further added that just a few portions of the foods were all that was necessary per week to help decrease risk.

"Erectile dysfunction is often an early barometer of poor vascular function and offers a critical opportunity to intervene and prevent cardiovascular disease, heart attack, and even death," said senior study author Eric Rimm, an epidemiology and nutrition professor at Harvard. "Men with erectile dysfunction are likely to be highly motivated to make healthier lifestyle choices, such as exercising more and eating the right foods -- which would greatly benefit their long-term cardiovascular health as well."