For those of you unfamiliar with Tongkat Ali, here is a link to one of the many published independent blind studies regarding Tongkat Ali: http:///content/10/1/28 . In this study, Tongkat Ali recipients averaged a 37% increase in testosterone, versus no change for the placebo group. Want to read independent Tongkat Ali Reviews? Consumers at WebMD have rated it out of 5. Read the reviews here: http:///vitamins-supplements/ingredientreview-1132-eurycoma+?drugid=1132&drugname=eurycoma+longifolia . Links to other research spots can be found here .