Citracal is the only leading calcium brand that offers products with calcium citrate, which is a well absorbed form of calcium. All Citracal products contain vitamin D3 for unsurpassed calcium absorption. Unlike other calcium products that contain carbonate, you can take Citracal Maximum with or without food. Citracal Maximum can be taken with heartburn medicines, such as PPI therapy, that control acid because you don't need stomach acid to break down calcium citrate. *This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.