Bloodtypes

hey,

A friend that I know told me that if you are a certain bloodtype you cant have certain foods. Shes read lots of books on it and stuff. Is this true? She said a certain kind of bloodtype cant have tomatoes and wheat,and she said a certain kind of bloodtype has more allergies. She said some bloodtypes like her mom's doesnt react well to colon cleanses.

I havent heard anything on here on this and was just curious..