Cannabis flower crystals are called trichomes, when sifted and pressed they become kief. Kief is an ultra-strong extract because many of the beneficial compounds in cannabis—terpenes and cannabinoids—are concentrated in the trichomes. A small pinch of kief on top of flower medicine in a vaporizer or pipe will increase the therapeutic effect—and it’s a great way to extend your budget. Kief takes effect immediately; remember that a tiny amount goes a long way.