CA-D-GLUCARATECalcium D glucarate is the calcium salt of D glucaric acid, a substance produced naturally in small amounts by mammals, including humans. Glucaric acid is also found in many fruits and vegetables with the highest concentrations to be found in oranges, apples, grapefruit, and cruciferous vegetables. Oral supplementation of calcium D glucarate has been shown to inhibit beta glucuronidase, an enzyme produced by colonic microflora and involved in Phase II