Our products contain concentrated amounts of cold-processed fruits and vegetables that can have some detoxifying properties. Upon first starting with PureFood products, you may experience some mild symptoms such as loose bowel movements, headaches or mild digestive discomfort. This is common and not a cause for concern. If this is the case, reduce the serving size to start and gradually increase as you can tolerate and as your system adjusts to the increased intake of fruits and vegetables. As always, if you have any specific concerns, it's best to consult with your healthcare practitioner.