Hello I can't comment on the good or bad effects of it. But I, as a doctor, have never advised my patients to use such things. I have talked to the executive who tried to sell it to me. He agreed my argument & went off. If you are using it for reducing weight, I suggest, instead you can follow some simple diet & exercise regimen. It may help you, but not hurt you. If you are using it for gaining weight, again follow diet and exercise. There is a saying that "including the sun, anything under the sun can be allergic to a person" You can consult a doctor before going on for any diet I can help you if you need Good day