Optimum Nutrition Opti Lean Whey Vanilla (740g). Helps to support lean muscle growth.. 32 servings. 20g of high quality protein. Low fat with 1.0 g per serve. 95 Calories. For people who work hard at looking good because they want to feel good. Watching what you eat and exercising can be a lifestyle balancing act, and Optimum Nutrition’s new LEAN range is here to help.. Lean Meal Replacement Powder supports a lean & healthy diet with 20 g high protein, 202 calories and no more than 2 g of carbs per serving. Lean Meal Replacement Powder consists of high quality whey proteins which can be easily digested and absorbed into the body.