Forms Comparison
| Form | Bioavailability | Best For |
|---|---|---|
| Potassium Iodide | High | Standard supplementation — stable, well-absorbed, and most studied form |
| Kelp/Seaweed Extract | Variable | Whole-food source — iodine content varies significantly between products |
| Nascent Iodine | Moderate | Marketed as more bioavailable, but limited clinical evidence vs. potassium iodide |