It should last 2 hours to the max 30 to the mimimum because your loosing waighting I mean if you take one step you're gonna loose a calorie
I don't even think so because waste has to come out
I believe it's either microwaves or x-rays
I studied this last year
idk if it’s exactly 3 grams of fat. but low fat mean when your diet is mostly less in fat or saturated fat.