Very useful. Sticking to eating for a month or two will definitely be effective. There is no exact amount of weight loss. It depends on my physical fitness. I ate meal replacement powder from the United States. I only ate it for less than a month, and it can basically meet my ideal standard. I am very satisfied. I'm still taking it, and there are no side effects. I don't think eating this is like losing weight. Very suitable for me who don't like sports very much. But I want to remind you that you still have to find a manufacturer to buy this product. I hope my answer can help you.