Carbs suppress ghrelin the most, but it is temporary

http://www.ncbi.nlm.nih.gov/pubmed/19820013

Carbs supressed the hunger hormone ghrelin the most, but the investigators report that it was followed by a quick rebound.

Protein supressed ghrelin the least, and fat somewhere in between protein and carbs.

Interesting that the obese group reported more hunger following the carb meal.