For some, yes. If you have been eating a diet full of processed, chemically-laden foods, you may experience a cleansing reaction when first taking BōKU® Super Food. BōKU® Super Food contains some of the most powerful and cleansing nutrients found in nature, and as a result it can initiate beneficial detoxification and cleansing reactions. For most people, this process will go on “behind the scenes.” If you do experience any uncomfortable reactions, such as headaches or loose bowels, simply take a smaller dose and build back up to a full dosage once you feel better.