Contains a unique plant-based ingredient, specific to all LithoLexal® products, different from the rock-based ingredient (dolomite) of generic and branded calcium products available today, which by nature is difficult to absorb.From the onset of menopause, the rate of your body’s reabsorption of calcium from your bones can increase significantly and your bone mineral density can decrease. When this process reaches a certain stage, it may become osteoporosis.