Natural source of iodine* Kelp is chock-full of nutrients including iodine, which is greatly appreciated in trace amounts by your thyroid. In fact, Kelp is one of the most nutrient-rich algae on the planet. And it’s been used in Traditional Chinese Medicine for over 5,000 years to support strong thyroid function, among other things.* Freshly milled and prepared with love for optimum potency.