No to herbal food supplements

Although my wife is taking an herbal beverage for her kidney stones, I am wary of the herbal food supplements in the stores that claim to prevent diseases. And if you will make a list of what those stores are selling - prevention of cancer, leukemia, hypertension, etc - all diseases are covered. So if I take all those supplements every day, will I be free of any disease? That's funny, isn't it?

Do you believe in herbal supplements even if the label says "no approved therapeutic claims?"