Answer:
Weight gain.
Step-by-step explanation:
In order to complete functions, our body needs energy, and calories provide a deposit of energy, which is fat. So, when we consume calories, this is used as energy and the rest is stored as fat. Therefore, if we eat too much calories, the fat stored will be increased, which it's translated as more weight.
In addition, the fat is even more dense than muscle, which means that through this way, we will weight gain faster and less healthy, because it's not muscle based.