Kief refers to the loose, dried resin glands (or trichomes) of cannabis. Kief can be smoked in a number of ways, including using smoking pipes, Waterpipe (bong), in a vaporizer or rolling papers (resulting in a joint). Kief contains a much higher concentration of desired psychoactive ingredients, primarily THC, than ordinary preparations of cannabis buds from which it is derived.
The effects are very strong and an excellent appetite stimulant. Also, it is effective in reducing nausea.