Essential Multi 4 in 1 - Multi, Calcium, Fiber, and Protein Shake. This is so MUCH MORE than a protein shake! This is as close that you will ever get to having an ALL IN ONE bariatric protein shake supplement! Our Essential Multi 4 in 1 shake is a one of a kind way to get your multivitamin, calcium, fiber AND protein all in one. Each ENS (Essential Nutrient System) shake contains a high potency multivitamin, 500 mg of calcium citrate, 4 g of fiber, and 25 g of whey isolate protein in each serving. Daily Dosage = 2 servings or 2 packs