2-minute video ~ One way to try breaking through a weight loss plateau is increasing the amount of protein you consume each day, and we have the perfect tool for you to do just that: IsaLean PRO Shake. IsaLean PRO is a complete meal replacement with a balance of protein, carbohydrates, and fats plus 23 vitamins and minerals and digestive enzymes. It features 36 grams of undenatured protein, providing a protein-fueled boost to support muscle maintenance and growth.