Nature’sfield Mass Gainer powder is a nutrient-dense formula that contains the following constituents: Protein (50mg), Calcium (891mg), Iron (5.26mg), Sodium (1,180mg), Potassium (2,459mg), Apple Fruit Powder, Sunflower Seed Oil Powder, and Enzyme Blend Complex (100mg respectively). Protein is an essential macronutrient for body building, repair of worn-out tissues, and accelerates wound healing.