Trouble With Finding the Right Sources

My paper is proving to be a lot harder to find research for than I thought! I'm writing about "food literacy" which is a term commonly used to classify ones understanding of food and it's journey from farm to table. I'm using the term a little differently by focusing on ones understanding of food and how to cook it in order to maintain a healthy lifestyle. My main focus is the public discourse which has caused us to leave the kitchen and start relying on fast foods as a source of nutrition. I'm trying to connect Americans spending less time in the kitchen  to how our understanding of how to cook has decreased over the years and how this whole thing is impacting our health.   

I'm having trouble finding research that isn't about women and how "they need to get back in the kitchen". I have a few good sources but I'm lacking research in the statistical/factual  aspect of things, mostly. I need to find out more about how fast food consumption directly impacts our health, especially in younger people. If anyone has any sources you think would relate, I would love to check them out!