Cannabis concentrates contain concentrated amounts of the active molecules in marijuana like THC and CBD, which relieve nausea, vomiting, pain, muscle spasms, tension, and symptoms of Crohn’s Disease among other uses. Manufacturers use their hands, ice water, or various solvents like butane, hexane and alcohol to concentrate the cannabinoids in marijuana, boosting potency, while decreasing the smoke created by burning the entire flower bud of marijuana.