Thanks Zul, no I have not been brushing my tongue, I will try that. I am taking a 1 500mg vitamin C/day and one multi vitamin. I have not heard of taking two multi's a day, since the one is supposed to have all of the required nutrients. I have done a search and read on some of the other forums that this is a sign of ketosis. I cannot find in the Lifespan book any mention of Ketosis, so I am not sure if they consider this good or bad.