Protein shakes are used to lose weight because they replace regular meals throughout the day. They are essentially a way to reduce caloric intake.
You’ve seen those ads on television that boast quick weight loss by just drinking a shake for breakfast and lunch.
It works because you are reducing the calories you eat throughout the day which in turn makes you lose weight.
The down side for protein shakes is that they only work for as long as you use them, many people gain the weight back once they stop drinking the protein shakes.
If you want to drop a few pounds fast then do use the protein shakes that help you lose weight. Use it as a tool to motivate you into continuing to care about your figure; however, do not rely on them for your entire diet because you will not learn how to control your food intake.
If you do not learn to control your eating, when you stop using protein shakes, you will go back to eating the same foods that made you want to lose weight in the first place.
Also, note that you should only substitute them for meals, and not take them throughout the day because you will increase your caloric intake, you won’t lose any weight and instead there are very good odds you may gain some more.