I think no one knows what healthy food really is because basically anything can be labeled as "healthy" or "natural" but most of it is highly processed. "Organics" which has the emotional connection of being "healthier" is always more expensive, but you can find that same organic food at a farmers market for a much less price.

I don't think it's possible to really eat healthy anymore, unless you are growing it, or slaughtering it yourself, or you have some closer understanding/connection to its source, such as a local farm & butcher, farmers market, etc.