Taking protein as a "supplement" won't harm you. Remember it's a "supplement" so should be supplementing / topping up your diet. If you have not gained any mas

Taking protein as a "supplement" won't harm you. Remember it's a "supplement" so should be supplementing / topping up your diet. If you have not gained any mass or noticed any physical/strength changes I'll almost guarantee you are under eating, you need to eat a big amount of good quality carbs such as rice and sweet potato,a good amount of protein and as much vegies as you can. When you cannot eat anymore and full that's when protein shakes help as it's a easy way to get calories in. Likewise it's an easy way to get calories in if you are don't have time to eat for example in between meetings. I've struggled to gain real mass, plateaued for a long time. Biggest improvement for me was going simple after getting a PT, 200grams carbs and 200 grams of meat per meal 5 times a day with a side of green vegies, I don't count vegies, just as much as I can eat. If the food looses weight while cooking (sweet potato) weigh it after cooking, if it gains weight while cooking (rice) weigh it uncooked. Training wise concentrate on the big compounds, bench, deadlifts and squats to get some mass.