I would not recommend hat eating as a source of fibre. So, this potion has chrysanthemum fibre, whereas Fybogel uses psyllium fibre, otherwise the ingredients are very similar. Again. I iterate it is probably the fasting that is the active ingredient. Fybogel is a laxative, so does this product do weight loss by same method? that is what dietary fibre does - naturally! Otherwise there is nothing else in the potion that could be described as an active ingrediet, so it is definitely smoke and mirrors.
But there seems to be no warning about aspartame, so that is IMO naughty and potentially dangerous for a some people and can induce anaphylactic shock. does the product carry a warning?