Calcium Ascorbate Powder for Food Supplements Anyone looking for acid-free vitamin C as a dietary supplement will make a good choice with Health + Calcium Ascorbate Powder. Vitamin C is an ascorbic acid that, however, can cause acidification if taken in high doses. Also, calcium ascorbate, vitamin C, but here it is in basic, non-acidic form and can be dosed much higher than pure ascorbic acid, intestinal stomach problems can result in large amounts. If you have a sensitive stomach or do not want to upset your acid-base balance, it is best to use stomach-friendly calcium ascorbate to meet your vitamin C needs. We recommend 1.22 g of powder (1 heaping measuring spoon) for take daily with water. The dose can be slightly increased in acute illnesses. How to use: 1.22 g of powder (1 heaped measuring spoon) to take daily with water