No matter what your eating program is, restricted, or not, you are still human. As a human you must take in energy, nutrients, sleep and excrete waste. If you take in more nutrients and energy than you use, the remaining energy will be stored as excess fat. The good news is that this is natural. However, unless you plan to hibernate for the Winter, keeping tabs on the amount of fat you store will be in your over all best interest. If you effectively succeed at this step and you keep accurate records, not trying to lie to yourself, and you don’t have a medical condition that is causing the weight gain, you can and will succeed.