Traditional Thyroid Function. Certified Authentic Tru-ID. Vegan. Non-GMO Project Verified. Gluten & Soy Free. No Sugar or Dairy. No Artificial Colors, Flavors, or Preservatives. . Traditional Thyroid Function. Kelp is a type of seaweed that grows underwater, and is an excellent source of iodine. Nature’s Way sustainably sources kelp from cold water climates, like Nova Scotia, where the wildcrafers carefully cut the leaves without uprooting the plants to allow for regrowth in the future.



