A concentrated lipid-based solution including tetrahydrocannabinol (THC) is manufactured by providing a lipid solution including an array of triglycerides, cannabinoids and water soluble contaminants in a pressure vessel. Water is added to the lipid solution to create a mixture and the pressure is increased in a first phase at a first pressure and duration and in a second phase at a second temperature and duration. The mixture is agitated to dissolve the water soluble contaminants. The mixture is cooled to cause the triglycerides and cannabinoids to solidify. The solidified triglycerides and cannabinoids, including THC, are separated to yield a purified cannabinoid solution.
