Protein supplementation may help you in a number of situations. Not only when you're trying to gain weight or develop muscles, which seems to be associated with it the most. To be perfectly candid, it can be a great option for a huge number of people, but not many of them are aware of that, unfortunately. It all depends on what your nutrition is like at the time of using whey supplements. If you're in the surplus - you're likely to gain weight, but if you're not, then you probably won't. What whey protein does, most of all, is help you in the process of building strong muscle tissue. If you're consistent in your workouts and protein supplementation, then you'll reach your body-related goals, whatever may they be.