Thyroid labs decoded. Plant Sourced Thyroid Supplements. Integrative health, Integrative medicine. Hypothyroidism is a condition in which the metabolism process of body slows down resulting in weight gain. It is because the thyroid gland responsible for producing thyroid hormone produces an insufficient amount of thyroid hormones. It results in irregular eating habits and remarkable change in body weight. Thyroid gland produces hormones that play a vital role in the body. Hyperthyroidism is..