Fenterdren is advertised as the hardcore fat burner that is so controversial and yet still completely legal. There is some degree of truth to that. It is definitely a hardcore and effective fat burner that will leave most others embarrassed and buried. But it is only controversial because of jealous competitors in the most likely case. It doesn’t have ingredients that would cause side effects beyond that of caffeine in general, which is found in just about every diet pill, and it is less likely than some others to cause those side effects. It has various mechanisms of action and really impressive ingredients, and we would definitely recommend its use.