MRM's Natural Gainer contains a special combination of whey protein concentrate, isolate and micellar casein to provide both fast and slow digesting proteins. This contributes all the essential amino acids to support lean muscle growth.* MRM's Natural Gainer contains a clean carbohydrate complex of fast and slow digesting carbohydrates and fiber to provide a long-lasting source of energy without creating blood sugar spikes, which can be detrimental to healthy weight gain.* In addition, they included sunflower oil, a heart healthy oil high in unsaturated fats.* They added enzymes and probiotics to help balance the microbiome to support better immune, and digestive health so you can get the most from the foods you eat.*