With B-Complex and Vitamin C Cal-Mag Stress Formula is a mix of calcium, magnesium, vitamin C, and a full range of B-vitamins which aid in the production of energy.* Vitamin C, in addition to its function as an antioxidant, helps to support a normal adrenal response.* This product also provides the daily recommended levels of calcium and magnesium, both of which are necessary for skeletal health.* All together NOW Cal-Mag Stress Formula has essential minerals and nutrients required for optimal daily functioning.* Natural color variation may occur in this product.