I went to the health food store for herbs and advice on my gallstone and the guy said that there are some new studies out on cooking fats in the microwave, he said the microwave turnes the fat into something the body cannot process, he just said don't cook fat in the microwave i only use it when i have to and mostly to boil water, i thought it kind of made sense so i just try not to use it.
O and by the way if you don't want to get gallstones here are a couple tips, Apple juice is good for keeping them down, and a lemon wedge squeezed in some water, no crash diets, and do not go without eating for a long time because your gallbladder fills up and cannot empty till you eat.
diets high in fiber are good also and exercise. I had no idea they are so common till i had one. I will stay away from the micro just to be on the safe side.