Just to go ahead and clear up all of the myths right now, there is NO scientific evidence yet available to us that smoking speeds up the metabolism.

Endocannabinoids and cannabinoid receptors are abundant in the hypothalamus, the region of the brain that plays a pivotal role in appetite regulation. In 1992 researchers identified the first endocannabinoid and named it anandamide, from the Sanskrit ananda, meaning inner bliss. In other words, when you smoke pot, you're replicating (albeit with much greater intensity) an effect the body produces naturally for itself.

The cool thing is, scientists USED to think that cannabis caused low blood sugar which triggered the munchies. Since they're linking it to the appetite part of our brains, they're making BIG strides in producing products that could possibly have the opposite effect, ie; Munchie Killer.