You are likely experiencing a diet of this nature for the very first time. Any time you alter your diet, common side effects such as stomach discomfort, diarrhea, and constipation can occur. Rest assured that this is very common. You can diminish this symptom by decreasing your serving size of PureNourish. Your body should naturally adjust to your new diet within 1-2 weeks, alleviating symptoms. If not, please contact your physician.