There are over 500 chemicals in the marijuana plant and about 80 of those are cannabinoids, which are the active ingredients. Concentrate producers harvest these from the plant and create a substance made up of only these active ingredients, similar to juicing an orange. Concentrates are usually ingested via inhalation, but can also be ingested orally and are often used as an ingredient in infused edible products.
As with the raw marijuana plant, regulation is a more effective public health approach than prohibition. DPA recommends regulations that restrict the use of combustible methods in home production (similar to distilling liquor), the development of a framework for licensing concentrate manufacturing, better education about the high potency of marijuana concentrates, and protecting access to concentrates for people who need them (such as medical marijuana patients).