While there are many factors to acne, fatty acids have been the biggest boon.
EPA (the omega 3 found in fish/fish oil) and Arachidonic acid were abnormally low. EPA is low due to poor antioxidant status (probably), and the arachidonic acid is low, perhaps due to the rapid conversion to prostaglandins and other Arachidonic acid metabolites.
Oct.-Dec. 2014: Gluten-Free Diet, Multi with Zinc and Copper, Broad-Based Probiotic, Aged Garlic Extract
There seems to be good evidence that acne correlates or is caused by a fatty acid imbalance.