If your calories were close to the same, you shouldn't experience side effects like weight gain. However, your body may react to other things, like increasing protein. If you were eating the same calories but were really low in protein (like most women are) your body may react to that. If you've noticed any digestion or intestinal issues, you may need to slowly work your way up to the protein numbers. Of course, you may not have any side effects at all - your body may LOVE the changes!
