It is very rare, but occasionally CLEANSE may cause some digestive discomfort when first starting. 

Firstly, if your body isn't used to the level of fibre that it contains, then it can cause some initial bloating and flatulence when you first start taking it. In addition, CLEANSE is an effective probiotic and prebiotic, and when you first start taking these, they can also cause bloating and discomfort as your own internal bowel flora adjust.