Like garlic, onions too help treat ED. In a study conducted on male rats, fresh onion juice was found to have improved copulatory behavior and cured medicine-induced sexual dysfunction.8 They are also believed to help treat involuntary loss of semen during sleep or other times. Studies also show that like garlic, onions too offer some protection against testicular oxidative damage and spermiotoxicity.9
DHEA. DHEA, or dehydroepiandrosterone, is a natural hormone that the body uses to make the male hormone testosterone. DHEA and testosterone decrease with age, just as ED increases with age, so it seems that taking DHEA might protect against ED. But Harris says that "it is unlikely that taking DHEA would raise your testosterone enough to make much difference." DHEA should not be used by people with liver problems; it also has many side effects.
A study published in May 2014 in The Journal of Sexual Medicine found that some men can reverse erectile dysfunction with healthy lifestyle changes, such as exercise, weight loss, a varied diet, and good sleep. The Australian researchers also showed that even if erectile dysfunction medication is required, it's likely to be more effective if you implement these healthy lifestyle changes.