Drive over to the grocery store and go down the Health & Beauty Aisle. There you will find "Slim Fast." It comes in a can, usually they are sold in a six-pack...
But seriously, all you have to do is exercise everyday and eat healthy.
I'm guessing you are talking about the milkshakes? its probably not wise, because they contain vitamin and minerals and heating may affect its content. Plus, it thickens and heating might change its...