Suez - Good suggestions above. The only thing I would add is whichever kind you decide to get, try to get a small quantity to start. I bought some protein powder to add to my son's milkshakes and I didn't happen to mention to him that I added a small quantity (about one tablespoon) to his milkshake. (The Health Food Store where I got it said there was absolutely no taste to the protein powder) Big mistake! After the first small sip he took, he asked me what I put in his milkshake and refused to have any part of it! Ever! From then on, he would always ask me what was in anything I served him before he even tried it. Hope everything goes well with the appointment on Thursday.