Still on these studies, it has always been a mirage on ‘gateway effect’ associated to marijuana use. Therefore, prohibition of marijuana will always not work. On serious studies conduct on marijuana use, it was revealed that marijuana may prevent cancer. The other elemental study done on marijuana was the association of marijuana with medical value where it was revealed that it does have some medical values. All these marijuana studies conducted by those scientists have always affected many people on how they perceive this product.