Nature's Way - Acid-A-Cal Formula - 100 Capsules With the help of Nature's Way Acid-A-Cal, the body can maintain the proper acid-alkaline (pH) balance to function at optimal levels. Overly alkaline body fluids can make calcium harder to absorb, and calcium is essential for strengthening bones. Acidifying compounds such as ammonium chloride, betaine hydrochloride, and calcium phosphate can help support balanced pH levels. Acid-A-Cal provides these compounds along with important vitamins, minerals, and other natural factors. Acid-A-Cal is available in capsule form for easy assimilation.