Hi there. I'd like to suggest that you read Dr Atkins' New Diet Revolution as well as Atkins for Life. He outlines the diet completely in that book, and you will find the answers there to many questions.

Re: caffeine, Dr Atkins says that caffeine can cause hypoglycaemia and that is why he recommends ditching it.

However, many folk have lost and lost well while still drinking coffee, so I'd suggest you only stop if you are having difficulty losing. Just my opinion.