Hundreds of thousands of people consider IsaLean® Shake to be an essential tool for lifelong wellness — and for good reason. IsaLean Shake is a nutritious, balanced meal replacement clinically tested to promote effective, healthy weight loss while maintaining muscle. With 24 grams of high-quality protein, energy-fueling carbohydrates, essential fats, and vitamins and minerals, it provides maximum nutrition in 240 calories. Still need convincing? Have a shake, and let your body tell you how it feels.