Iodine is a trace element that is essential for the proper functioning of the thyroid gland. The thyroid gland uses iodine to produce thyroid hormones, which regulate the body's metabolism, growth, and development.
In protein powders, iodine may be added as a nutritional supplement to help support thyroid function and maintain overall health. It may also be added to plant-based protein powders, which may be lower in iodine than animal-based protein sources.
Iodine is generally considered safe when consumed in recommended amounts.