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  1. Food Dyes: Harmless or Harmful? - Healthline

  2. Where does blue food dye come from? | Scientific American

  3. Feeling Blue? The Truth About Artificial Blue Food Dyes and Their …

  4. Brilliant blue FCF - Wikipedia

  5. How to make natural blue food dye? - Chef's Resource

  6. The Effects of Natural and Synthetic Blue Dyes on Human Health: …

  7. How to make natural food coloring - King Arthur Baking

  8. How to Make Blue Food Coloring Naturally (with Pictures) - wikiHow

  9. Synthetic food dyes: Health risks, history, and policy

  10. Natural Blue Food Coloring from a Surprising Source - Whole New Mom