Its most likely the muscle milk or whey..... Cop a Whey Isolate not a Concentrate, that dirty protein might break you out & s**t
yea i use to take muscle milk and it would give me face acne. i dont recommend it tho. in my opinion its a weight gainer and it has too many carbs in it. half of the calories is fat. most likely your acne is coming from the muscle milk or ether your sweating alot and its drying on your skin before you wipe it off. do not use hot water when you shower or it will burn and irritate. use cool water and dont scrub hard or you will make it spread more and itch.