I have found that my adult acne (I'm 42yrs old) has sometimes flared up rapidly. Some months ago, I formed the theory that this coincided with eating wheat. With further experimentation, it seemed as if it might be the gluten-containing parts of the wheat that had the effect.
However, my current theory is that maybe it's not the presense of wheat or gluten that triggers my acne, but is instead the amount of the amino acid lysine in my diet. When I eat a lot of wheat, it is generally at the expense of lysine-rich foods such as beans. Furthermore, taking arginine supplements seems to trigger my acne. A high arginine - lysine ratio has sometimes been claimed to aggravate various skin conditions.
If there is a lot of cereal in your diet, it could be worth replacing some of it with beans.
If we don't play God, who will? [James Watson.]
The function of muscle is to pull and not to push, except in the case of the genitals and the tongue. [Leonardo da Vinci]