Hi there! If you’re talking about the G.I Lean weight loss support shake, then it certainly is different. That is a meal replacement shake with a balance of carbs and proteins and added vitamins and minerals, whereas the USN protein shakes serve as a protein supplement only. All shakes needed to be regarded as separate entities, as they will all serve different purposes. Protein shakes are to support muscle rebuilding and repairing – typically used when you are on a high strength training programme and need to fuel your muscles adequately. A meal replacement shake serves to do just that – replace a meal with a healthy, balanced, calorie-counted alternative.