Creatine is basically a fuel. Your car needs petrol to make it move. Your muscles need ATP. All your muscles have this energy source of ATP and this gets burnt off every time your muscles contract. When the ATP runs out your muscles are fatigued and cannot do any more work.
Adenosine triphosphate (ATP) is the biochemical way to store and use energy. It is the source of energy that keeps everything going.
Firstly, creatine is the first port of call that your body goes to when your diet is missing amino acids. Creatine is made from two amino acids, arginine and glycine from which nine other amino acids can be manufactured.
So creatine is a great ‘anti-catabolic,’ protecting your body from breaking down existing muscle tissue to make up for times we cannot get down the food with the correct amino acid profile. That is the main benefit of creatine. The muscle gains will be indirect from the strength increases and mainly the anti-catabolic properties