Gram for gram, getting high off edibles requires more weed than virtually any other kind of cannabis consumption. About 30 percent of available THC will find its way into your bloodstream when smoking a joint and up to 80 percent through a vape. Edibles? Only from 4 to 20 percent. This is why you get a decarboxylator, which, for the uninitiated, is like a super-precise countertop oven used to maximize the THC content in flower.