Here's why I feel this onion study does not relate to elevating testosterone production in non-sedentary humans.
We already knew eating vegetables is healthy, but apparently they can also boost testosterone levels — dramatically.
The reason why onions are on this list is because they are shown to increase testosterone levels greatly, some say as high as 300 percent.
So two weeks might well be longer than needed to catch up — could well be twice as long as needed — as deficiency is not a matter of having only half of what one should in the body or anything as severe as that.