Hello - I have done several juice cleanses and the fast mimicking diet and never had any side effects. Keto cleanse was very different. You might include in your literature the importance of drinking maybe twice as much water as you think you need and maybe with some salt to help prevent the side effects / keto flu. I had a serious headache the first night and brain fog days 2 - 4. I often felt mildly nauseous, and heart heart palpitations one morning - which is all normal after I read about it online. It was concerning on morning 3 when I felt a bit faint and so I went ahead and had a small spinach salad. the juices are great and easy to get down with the exception of the green one. after the 8th green one, I was done. I could not get another one down. Maybe work on making that one more palatable. Overall it was a good experience, now that it's over. I would not recommend this one to anyone trying a cleanse for a first time. Today is day 5 and i'm feeling more myself. I was never hungry on this cleanse which was great. Keep up the great work!