REC 22.2: “The evidence does not support using L-thyroxine and L-triiodothyronine combinations to treat hypothyroidism.”REC 22.4: “There is no evidence to support using desiccated thyroid hormone in preference to L-thyroxine monotherapy in the treatment of hypothyroidism and therefore desiccated thyroid hormone should not be used for the treatment of hypothyroidism.” Here, TG is linked to hypothyroidism.