cannabis in many varieties and cannabinoids especially the most significant naturally made potentially cheaply sourceable receptors' agonist compound delta-9-thc, when taken not occasionally, in increasingly large quantities, in extracted purified forms, at high molar concentrations (up to and over 5-10 µM) have demostrated - albeit not in many clinical settings despite numerous studies since 1974 have confirmed such potential usage - a strong antiproliferative, antineoplastic, antitumor, anticancer activity.