Leslie, part of the WLS procedure, and the reason it works so well,is because you are not absorbing your food as well as before. Unfortunately, this means you are not absorbing your vitamins and minerals as well, which is why my doctor makes sure you understand that for the rest of your life, you will have to take iron supplements, multivitamins, and calcium. Sometimes it's necessary for B-12 injections to be administered too. Talk with your doctor about your vitamin and mineral regimen, maybe it's time to have your iron and B-12 levels checked, and see if that's the problem. Good luck to you.