Losing weight is very professional. Milkshake is protein (its quality and amino acid pattern depend on its quality and value), a nutritional supplement and a raw material for muscle growth. Whether to rebound depends on your muscle mass and basal metabolism.
I've had Herbalife milkshakes and strictly observe two meals a day. The effect is still there, but it is not as good as advertised. Of course, it is still necessary to cooperate with proper exercise. You can only do aerobic exercise in the early stage. The main purpose is to reduce the body fat content and lose weight first, but not too much to reduce the intake of protein and carbohydrates.
If you don't want to rebound, it's best to combine anaerobic exercise, take a proper amount of protein, improve the muscle ratio and form the habit of exercise. This applies to any weight loss method. To lose weight healthily, don't be superstitious about drugs first. Most diet pills do great harm to the body. The food is diverse, mainly cereals, with thick and thin collocation. Eat more fruits and potatoes; Fruit eats gold in the morning, silver at noon and copper at night.