Pure Nutrition Calcium contains Calcium citrate malate, the best-absorbed form of calcium. Along with calcium, it has vitamin D, zinc, magnesium, and vitamin K2-7 that work synergistically for optimum bone strength and calcium absorption. The supplement is also enriched with natural extracts of moringa and hadjod. While hadjod serves as a naturally rich source of calcium, moringa helps fight inflammation and prevents bone deterioration.