About this item Comprehensive Multi-Mineral Formula: For individuals at high risk for mineral deficiencies, including the elderly Research-Based: Contains well-researched forms of minerals Calcium/Magnesium: Highly absorbable dimagnesium malate and dicalcium malate Non-Constipating Iron: Ferrochel ֠an exceptionally well-tolerated form of iron Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish.