A synthetic thyroid hormone Requires a veterinarian's prescription

Active Ingredient: Levothyroxine sodium

Thyro-L is a synthetic thyroid hormone used as a substitute for thyroid hormone when the horse is not producing enough, or to correct conditions associated with hypothyroidism.  Each pound of Thyro-L powder contains 1 g of levothyroxine sodium (T4); each teaspoonful contains 12 mg of levothyroxine sodium (T4). Each 1 pound jar contains approximately 83 teaspoons.  Available in SmartPaks, or in a 1 pound jar or 10 pound bucket.