NOW Castor Oil 650mg,120 Softgels. Castor Oil is an oil derived from the beans of the castor plant (Ricinus communis). Castor oil has long been recognized as a powerful laxative which may be used for the relief of occasional constipation. supplement has made from cold pressed castor oil. Its a dairy free, Egg free, gluten free, nut free, soy free, non GMO & keto friendly.