The use of calcium carbonate for relief of occasional heartburn has been well accepted.* Calcium carbonate works by neutralizing the acid produced in the stomach.* It can however, slow down the digestion of food when used alone because the enzymes secreted by the stomach only work at acidic pH.* Acid Relief with Enzymes combines calcium carbonate with digestive enzymes to encourage complete digestion of food, even in the presence of reduced stomach acid.* NOW® Acid Relief with Enzymes delivers rapid relief from occasional indigestion, as well as digestive enzymes in a delicious chewable tablet.* Natural color variation may occur in this product.