I just started using Met Tathione (reduced Glutathione) from Japan. Since it's shows on its bottle and it was mentioned on several reviews that I read -that its a dietary supplement, does it mean that there is a possibility that it can cause weight gain? How can I prevent it?

Plus, I'm also taking contraceptive pills, will Met Tathione reduce it's effectivity?

Anyone out there who's taking this product experienced weight gain while using it?

Please help! I'm really confused right now. :confused: