Ditto that her thinking probably came from the book "eat right 4 your blood type" - according to that book type A's are more prone to cancers and is full of eating/diet suggestions for each of the blood types to make up for any weaknesses (based on this guy's research that is). I have an "over friendly" GNC clerk in my area who is always full of advice and has told me on or more occassions what I should/shouldn't be feeing my kids. I kind of get a kick out of her enthusiasm and how she comes off like this total expert. She's a very cheerful person and find her somewhat uplifting and entertaining so haven't (yet) taken offense. It's hard to get her to shut her trap though and my kids are always with me and get restless while we chat - guess that's why she thinks I'm feeding them the wrong foods, ha! I am sure being given that information was the very last thing your friend wanted/needed to hear so definatley in his case was unwelcomed and uneducated advice.