Brief: When you are gaining up the carb percentage When you are losing or cutting down then protein go up Detailed: Hello Thank You for contacting HCM. Welcome to Health Care Magic. My name is Dr Muhammad Ahmad & i will look into your problem. I have gone through your query and would try to help you in the best possible way. Carbs..proteins and fats are all required for normal working of body what we need is a balance.. body builder do two things First they cut all the fat and then they eat massive protein and carb to make huge mass but before competitiions or when they want cuts ,they lower the carbs just enough carbs which can fulfill there energy requirment and they up the protein ratio so if you are cutting down fat these days and going for lean cut body you have to increase protein percentage and decrease carbs. BALANCE: means eating according to your needs if you wana gain muscle but you eating more carb you are not in balance if you wana lose muscle and get cuts but you are eating more carb less protein again you are not in balance so balance means to adjust your diet according to need Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. Wishing you good health