The problem was, the child's diet had no good iodine sources. (health.com)
Furthermore, unless the manufacturer procures their products from real food (e.g., iodine sourced from kale and not a synthetic culture), do not take the product. (cancertutor.com)
His parents were keeping him on a gluten - free, casein - free diet — which meant he wasn't getting the dairy products and grains that are major iodine sources in the typical American diet. (health.com)