webber naturals Calcium Citrate 300mg is ideal for those who have low stomach acid levels, as the citrate form of calcium is the most readily absorbable. Calcium is a mineral that works with other vitamins and minerals to help prevent bone deterioration. Calcium is also important in the maintenance of a healthy cardiovascular system, in the transmission of nerve impulses, and in the prevent of muscle cramps. These Calcium Citrate tablets contain no dairy, starch, sugar, wheat, gluten, yeast, soy, egg, fish, shellfish, salt, tree nuts, or GMOs and are suitable for vegetarians/vegans.