How does iodine-casein differ from ordinary iodine in supplements? — Organic iodine N30 – Evalar

Most iodine supplements contain it in inorganic form — for example, potassium iodide. Evalar organic iodine uses iodine-casein: a compound in which iodine is covalently bound to milk protein (casein).

The practical difference lies in how the iodine is released. When iodine-casein is taken, iodine enters the body gradually as digestive enzymes break down the protein. This differs from inorganic salts, where the iodine becomes free as soon as they dissolve in the stomach.

That is why this form is often called “organic”: the iodine here is built into a protein molecule rather than simply present in the capsule as a salt. For buyers looking for a gentler way to include iodine in their diet, this is often the key argument when choosing.

It is important to bear in mind that iodine-casein is obtained from casein, a milk protein, so the product is not suitable for people with a milk protein allergy.