Be very careful with supplements from the grocery store. Some of them are for bodybuilders and are loaded with sugar, plus most of them don't taste very good. I would seriously consider looking at
www.bariatriceating.com and ordering their sampler pack. You get sample sizes of tons of different protein powders. You don't want to buy a big ginormous tub of stuff and then find out you don't like it. Believe me. I currently have 6 $30+ tubs of powder sitting on my kitchen counter that I can't touch. The sampler pack is the absolute best way to go!