Bariatric Advantage Calcium Crystals are a unique form of calcium that dissolves readily in water and most other liquids leaving minimal taste. This form, Calcium Lactate-Gluconate, has a bioavailability comparable to Calcium Citrate , but is neutral pH and has very high solubility in water making it perfect for a drink mix. In addition, each serving of Calcium Crystal contains a full 500 IU of vitamin D3 to support bone health. You can add this delicious product to plain water or another drink of your choice as an easy and effective way to meet your daily needs for calcium and vitamin D. Calcium Crystals stick packs include 25 individually wrapped stick packs unflavored.