Generally, Whey protein drinks are designed to help you maintain a healthy weight but increase your protein consumption. Ultimately, it depends on how you consume these drinks. While most protein powders are low in calories, they can be used as meal replacements. In such cases, it creates a calorie deficit in your diet, thereby helping you lose weight. However, if you consume whey protein drinks with your regular diet, it may not help you lose weight or gain weight in particular either.