This is a great example of supplement dusting. The recommended dose of Advantra Z is 100mg. Here is my source. This supplement only has 20mg. This is called a gross under dose of an ingredient. Be on the look out for this in the supplement industry. As I have said it before and will say it again, look for branded dietary supplement ingredients and make sure the bottle or bag you pick up has the correct dose per the manufacturer! Don’t forget, you can always reach out to me for questions like this. I want you to supplement smart and safe.