I am working on comparative analysis of household food security and nutritional status of coffee growers and what producer households of Ethiopia. Recently, Food and nutrition security is considered as single entity, rather than treating them as separate subjects. However, I couldn't find clear and sufficient sources to refer and work with. Most of researches indicated the title as " food and nutrition security" and yet their analyses came up with " food security" and " nutrition security " separately rather than "food and nutrition security" as combined analyses. I would appreciate if, anyone can help me to in this regard?