From seed to shelf, how cannabis extracts are made.

See how cannabis oil is extracted and produced.
Copyright, Project CBD. May not be reprinted without permission.
Recommended reading
Compared to whole plant CBD-rich cannabis, industrial hemp grown for fiber or seed is typically low in cannabinoid content. If you live in a state where medical marijuana is legal and available, look for CBD products made from cannabis.
There are many ways to extract oil from the cannabis plant—each with its pros and cons. Some methods are safer and more effective than others. Cannabis oil made with neurotoxic solvents like butane and hexane may leave unsafe residues that compromise immune function and impede healing.