I also found that my primal diet was giving me horrible breath. It wasn't something I'd ever had a problem with. For the last couple of months I drink maybe a quart of kombucha/week and several fermented dill pickles. I also make a point to have potatoes 2x a week or so. Yogurt had always been a part of my diet. It seems to be getting better. I think it's a gut flora issue and something smelly started growing as I cut the crap out of my diet.
CW-125, part calorie counting, part transition to primal
GW- Goals are no longer weight-related