Fig. 1From: Curcumin and tetrahydrocurcumin both prevent osteoarthritis symptoms and decrease the expressions of pro-inflammatory cytokines in estrogen-deficient ratsChemical structure of curcumin and tetrahydrocurcumin. a Curcumin, C21H20O6. b Tetrahydrocurcumin, C21H24O6 Back to article page