It is best to sell it to the person you are selling it to, because I am familiar with beer yeast, but other powders have certain attributes. The person selling it at least has some understanding of what they are selling, so it is safer to ask her.
Let me tell you something about taking beer yeast
For weight loss - drink it with water before meals, or add it to other beverage powders, there are no contraindications. It is best not to take anything else after meals. The most important thing to lose weight is to control the total intake and increase metabolism. This is eternal. Understand the product attributes according to this, only in this way can the best effect be achieved.