Iodine and Tyrosine 120ct by Pure EncapsulationsWhat Is It? This formula combines the amino acid tyrosine and the trace mineral iodine for thyroid hormone synthesis and healthy metabolic function.* Uses For Iodine and Tyrosine Thyroid Support: Tyrosine plays an important role in the production of thyroid hormones. Studies show that tyrosine interacts with iodine to promote thyroid hormone formation.* What Is The Source? Iodine is derived from salt brine. l Tyrosine is extracted from soybeans. These