DH and I have been low carbing since August and loving it. We started after reading the Briffa book, and didn't really follow any "diet" as such, just put Briffa's principles into practice.
I was given the Idiot Proof Diet cookbook for Xmas and reading the blurb at the start, they talk a lot about supplements, and remembering to take them. I haven't read their actual diet book, but is this something we should be doing too? If so, which supplements? We already take omega 3 capsules daily. Given all Briffa said about eating what we are evolved to eat, I can't imagine that cave man had a branch of boots the chemist to get his vitamins from! 
Can anyone shed some light for me?