Calcium is the most abundant mineral in the human body. It is commonly found in foods such as dairy products and fortified cereals. Calcium is essential for building strong bones and teeth and plays a role in muscle contraction and nerve transmission. It’s also an important mineral for healthy fetal development during pregnancy. If you’re looking for calcium supplements, you can find calcium and calcium citrate supplements at GNC in the form of pills, powders, delicious soft chews, and gummies.