"When people cheat, it's usually with foods that are loaded with sugar and fats, and that causes a lot more than just weight gain. Cheating with sugary, high-fat foods wreaks havoc on the body and causes inflammation to rise," Holistic Nutritionist Miriam Amselem told me. "Some of my clients complain about their joints hurting them when they cheat, and that's usually because of inflammation. They also feel bloated, uncomfortable, and sluggish. Some also feel irritable, because of sugar highs and lows."