Finally, calcium is one of the most important protein powder ingredients for one very important reason. Your body cannot adequately break down proteins into amino acids without an ample supply of calcium. In some cases, this calcium is added in the form of a “creamer”, which gives these powders their smoothie- or shake-like texture and feel in the mouth. In others, such as in a casein-based protein, the calcium is found naturally in the product. Before purchasing a protein powder, check the nutritional facts to see how much calcium is in that product. If it’s more than 8% of the recommended daily allowance, it’s enough to help your body break down the protein efficiently.