I exercise by myself, but I don't eat protein powder to gain muscle, because someone told me from personal experience that protein powder has an idea of improving energy.

However, after I finished eating, I didn't feel anything: I didn't gain muscle effect, and I didn't realize the effect of increasing energy (this effect seems a little, but it's difficult to compare). However, during that time, I seemed to have better energy and didn't gain weight! You may not have eaten enough.

However, protein powder should be effective for muscle growth under normal circumstances, but this effect must be based on reasonable and effective muscle exercise. Here, protein powder plays an auxiliary role. In other words, if you don't have reasonable muscle exercise, even if you eat protein powder as a meal, I'm afraid you won't grow any muscles!