I get the feeling if i don't drink protein shake after workout i feel low. Is it a mind thing or is it really a nutritional fact that hits the body? I usually don't go to gym and it has been 1 year since i could afford any supps so i stopped it as i think i will be putting my body under stress if i don't have protein shake.

Is it really true or just my mind being lazy? What are the alternatives when one does not have protein powder to gulp down?