I’ve genuinely had very few side effects. The first few weeks I struggled with some nausea, but was never sick. I was constipated for a while, but focused on hydration and high fibre and was absolutely fine.
i know of at least seven people who have started it because of the success I’ve had, and I’ve told them all the same thing. Take it of an evening, when you have no plans the next day. It helps you suss out if you’ll have any side effects