I don't know if this is something that others have experienced, but I have found that in the 3 weeks I've been on the plan I've been sick! I never catch colds, maybe one every other year-and now I'm on my 2nd one in 3 weeks (and this one is very nasty-sore throat, tired, yucky stuffed nose & ears, etc. ). I'm wondering if it has to do with the diet? I used to eat a lot of fruit but obviously now I don't...but I do take a lot of supplements including extra "C" and zinc, and eat a lot of veggies/greens. The thing is, my son started pre-school at the same time as I started Atkins-so I could just be catching all his bugs that he brings home and it doesn't have anything to do with the diet. What do you think? Anybody else notice a weaker immune system on the program?