Doctor's Best Curcumin with Curcumin C3 Complex and BioPerine contains a potent standardized extract of Curcuma longa root, known as turmeric. Turmeric has centuries of tradition in Ayurvedic healing. The active ingredients in Curcuma longa are curcuminoids, compounds that demonstrate potent antioxidant properties in scientific studies. Curcuminoids may benefit the joints, brain, heart and circulatory system by helping to neutralize free radicals.