美国采购需求：NMN补充剂、NMN胶囊、番茄红素粉、麦角硫因、唾液酸、依克多因粉

I'm interested in knowing more about the types of ginseng you have in stock. Could you please provide details on the different grades available? Additionally, I'm curious about the minimum order quantity for each grade. Also, would it be possible to receive a sample before placing a bulk order? This would help me evaluate the quality and make an informed decision. Looking forward to your response!