I really love Kal Cal-Citrate Plus. The bonus of Vitamin D and Magnesium are are much needed supplements and very beneficial. Calcium and Vit D have to work hand-in-hand. Amazingly this particular product helps me to relax at night, prevents leg cramps. Another added benefit is the magnesium for helpful and proper elimination. I take 4 tablets about 2 hours before retiring for the night. I recommend it to everyone.