If i fast for a week and take slim trim pm twice a day and butta burn 10 once a day how much weight will i lose if i am 5'4 and 135lbs?

Your BMI IS 23.2: It is not a good idea to fast for whole week.I can only tell you that slim trim and butta burn is not going to do anything and is a waste of money. You do not need to loose weight as your bmi is 23.But if you do want to loose few pounds, do not go starvation route cut down the total calories you consume, no sugars of any kind and reduce intake of carbsand exercise regularly at least 4 times a week.