Hi. Just an FYI - during an online chat with Dr. Agatston, a question was raised about imitation crab. Here's the that part of the script and I've also included the link if you want to read more of the chat:
Member Question: Can we use the imitation crabmeat?
Dr. Agatston: Yes. It's white fish, and that's fine.
http://www.mizfrogspad.com/South_Bea...t_07-22-03.htm
I think you would have to check the ingredients. Depends on the crab you buy. Some add sugar and other no-no's on SBD, but others don't.