Natural male enhancements should be consisted of just vitamins and herbs but there are some enhancements that are still natural but their ingredients are naturally derived from a kind of plant that can actually be potentially harmful. Like, some male enhancement products, there are also some skin bleaching creams that may use potentially dangerous ingredients. So when you’re looking for a natural male enhancement be sure you read over the ingredients well to be sure none of the ingredients have been in a past study or review where someone has had a side effect from it. But if you read over some of the ingredients, the testosterone levels that are boosted are from Testofen. The Irexis reviewed says the yohimbe ingredient is a small amount and is still safe to take and will produce a gradual effect from the ingredient for blood flow and erection quality.