In ketosis, your body is turning to your fat stores for fuel because you're not giving it enough instant energy. I've always considered it a good thing, too. The side effects, like strange body odor, metallic taste in your mouth, etc, can be lessened by drinking plenty of fluids to flush out the ketones (byproduct of ketosis). If you don't get enough protein daily, your body will next turn to the protein to burn for energy.
11 years post op DS
There is room on this earth for all of God's creatures..next to the mashed potatoes