Nature-Throid® (Thyroid USP) Tablets 

Nature-Throid® is an NDT drug that was first released (as Westhroid) in the 1930s, making it one of the first available medications for hypothyroidism. Nature-Throid® has a history of decades of safe use, and has never been involuntarily recalled by the FDA. Nature-Throid® is designated as hypoallergenic and is gluten-free. Nature-Throid® contains no artificial colors, artificial flavors, soy, yeast, egg, fish or shellfish, corn, peanut, or rice.


Manufacturer: RLC Labs

Manufacturer Website:

Prescribing information / Product Insert:

Inactive Ingredients and Excipients: Colloidal Silicon Dioxide, Dicalcium Phosphate, Lactose Monohydrate (trace amounts found in all Thyroid USP), Magnesium Stearate, Microcrystalline Cellulose, Croscarmellose Sodium, Stearic Acid, Opadry II 85F19316 Clear.

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The Natural Thyroid Guide site, webinar, book, and newsletter are created and managed by Mary Shomon, a patient advocate, health coach, and New York Times bestselling author of 15 books on thyroid and hormonal health, weight loss, and wellness. For more information, visit

Natural Thyroid Guide and Mary Shomon do not provide medical advice, diagnosis or treatment. See additional information.

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