That's what I had been doing so much more from past 2 years. Slowly cut down on buying processed foods, packaged foods and beverages. They're all loaded with toxic chemicals. I could literally feel the toxicity from specific chemicals the next day morning in my sinus. The national brands are the most dangerous ones, store/private brands have less harmful stuff.

There is an app Yuca, helps quickly scan the barcode of a product and gives you good/bad verdict, but also detailed analysis of ingredients.