I get Dr. Andrew Weil’s free e-mail newsletters, and the latest one had a paragraph about an anti-inflammatory diet (although he doesn’t mention acne):
Tip: Eating to Diminish Inflammation
There is growing evidence that prolonged inflammation may have some influence on the course of diseases such as cancer, Alzheimer’s and heart disease. Some ways to reduce the occurrence of inflammation include eating a diet rich in omega-3s, incorporating fresh, organic fruits and vegetables in your meals, and reducing your intake of polyunsaturated vegetable oils (such as sunflower, corn and safflower oils), replacing them instead with extra-virgin olive oil. Another tasty way is to use healing spices in your cooking: turmeric, ginger and red pepper can add zing to any meals and are all natural anti-inflammatories.
I’m not sure, but I think anything that one does to reduce inflammation in the body is going to at least reduce inflammatory acne. You can read more on the subject at his website, http://www.drweil.com . I find that polyunsaturated oils are the most difficult thing to eliminate when eating away from home. There’s oil in sauces and salad dressings, etc.