Eating carbohydrates is the most effective way. Second to that is eating protein (high-protein meals also raise your metabolic rate). Dietary fats aren't very effective at increasing leptin levels, and alcohol actually inhibits it.
In this match-up between these two goals, it may seem that fat loss is the preferred victor over advanced appetite. It may be the case, but do keep in mind that advanced appetite is not an option you shouldn't choose to take. Just be wary, however, to only have a goal of losing fat and not any other type of weight, and this match-up might end with a draw.
http://www.shadowville.com/board/general-discussions/advanced-appetite-an-enemy-of-calories#p515476
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