take protein shake before or after running to lose body fat and not muscle

I am currently trying to lose some body fat . Especially belly fat! I speed walk on the treadmill every morning for 1 hour and go to the gym in the evening to lift weights to gain some muscle. (6 times a week treadmill and 4 times a week weight lifting) I've been doing this for 4 weeks now. I use protein shake after both treadmill and the gym too. My question is ; should I take protein shake before or after the treadmill? I don't want to lose muscle, i want to lose body fat! If i take protein shake after treadmill will i lose muscle during treadmill? Should I take it before treadmill so that I can preserve muscle? I don't want to take it before and after treadmill since i already take some protein after my workout at the gym in the evening. Thanks everyone from now for your help. PLEASE DONT GUESS ANSWERS, ONLY ANSWER IF YOU KNOW FOR SURE :)

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