I don't know. I haven't used it. I was quite fat for a while. My friend introduced me to Viagra. It is very convenient to carry. It is a pure Chinese medicine preparation. As a result, I weighed myself in the shower six days later and lost weight. Although I only lost two pounds, I have always been fat and never lost weight. So I continued to use it with confidence and gradually lost weight. Now I see that I have lost weight.