"Chocolate per se will not make you break out," says Dr. Shamban. "In fact, there is little evidence that chocolate or any specific fatty foods will cause acne, but we do know that a high-sugar/high-fat diet can increase sebum production and promote inflammatory responses in the body -- which can lead to acne. Again, although we can’t say that sugary and fatty food directly causes acne, it’s nevertheless true that overindulging in these kinds of food can increase your chances of developing the condition and may displace other nutrients that are critical to the skin’s health. (i.e. filling up on sugary foods may lead to less consumption of fruits and vegetables