Sir I Am 17+ .i Am Doing Gym Exercises Upto

Sir i am 17+ .i am doing gym exercises upto 7monts with fully maintenance schedule & diet plan.But i am geeting very slow development. i also avoid to eat protein supplement. i eat only natural protien like eggs & much more.but sir can you suggest me about any common protein & fatty liquid medicine.also that type of supplement like horlicks,buorn vita...Thank u Verey Much Sir.