You can take whey protein if you workout daily.or take high protein foods like all milk and milk products, eggs, pulses, sprouts, nuts, tofu, rajmah, chole, soyabean, paneer, chicken, fish etc. to gain muscle mass.
Health Tips
drink plenty of water every day.
Take small and frequent meals at regular intervals of 2-3 hrs. Avoid outside food completely. Avoid preserved foods.