Nature-Throid You Improved



Nature-Throid Medication

Nature-Throid was first released in the 1930s, making it one of the first available medications for hypothyroidism. Trusted for more than 80 years, Nature-Throid has never been voluntarily or FDA-recalled for inconsistent T4 or T3 hormones. Our affordable and hypoallergenic medication remains in high demand by doctors and patients alike.

The benefits of Nature-Throid include:

  • T4 & T3 replacement hormones derived from natural desiccated porcine thyroid
  • Naturally occurring thyroid cofactors T1, T2, calcitonin and iodine (in trace amounts)
  • Always gluten-free
  • Contains NO artificial colors or flavors
  • Contains NO soy, yeast, egg, fish or shellfish, corn, peanut, or rice


Take Nature-Throid in the morning on an empty stomach 30-60 minutes prior to food or caffeine with an 8 oz glass of water unless otherwise instructed by your physician. If you’ve already eaten, this medication can be taken two hours after consumption with an 8 oz glass of water, after which you must wait 30-60 minutes before consuming food or caffeine.

Some medications and supplements may lower the effectiveness of Nature-Throid when taken together, so it is important to take Nature-Throid at least one hour before any other medication.

Calcium supplements, iron products, or antacids must be taken four hours apart. Some foods may cause your body to absorb less Nature-Throid, including walnuts, infant soy formula, cottonseed meal, and high-fiber foods. Talk to your doctor about adjusting your dose if you consume these foods. Always follow these guidelines unless otherwise instructed by your physician. Keep out of reach of pets and children.


Nature-Throid is available in 13 strengths. These vary from ¼ grain (16.25 mg) to 5 grains (325 mg).

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Nature-Throid ¼ GrainNature-Throid ¼ Grain

¼ Grain (16.25 mg)

9.5 mcg T4, 2.25 mcg T3

Nature-Throid ½ GrainNature-Throid ½ Grain

½ Grain (32.5 mg)

19 mcg T4, 4.5 mcg T3

Nature-Throid ¾ GrainNature-Throid ¾ Grain

¾ Grain (48.75 mg)

28.5 mcg T4, 6.75 mcg T3

Nature-Throid 1 GrainNature-Throid 1 Grain

1 Grain (65 mg)

38 mcg T4, 9 mcg T3

Nature-Throid 1 ¼ GrainNature-Throid 1 ¼ Grain

1 ¼ Grain (81.25 mg)

47.5 mcg T4, 11.25 mcg T3

Nature-Throid 1 ½ GrainNature-Throid 1 ½ Grain

1 ½ Grain (97.5 mg)

57 mcg T4, 13.5 mcg T3

Nature-Throid 1 ¾ GrainNature-Throid 1 ¾ Grain

1 ¾ Grain (113.75 mg)

66.5 mcg T4, 15.75 mcg T3

Nature-Throid 2 GrainNature-Throid 2 Grain

2 Grain (130 mg)

76 mcg T4, 18 mcg T3

Nature-Throid 2 ¼ GrainNature-Throid 2 ¼ Grain

2 ¼ Grain (146.25 mg)

85.5 mcg T4, 20.25 mcg T3

Nature-Throid 2 ½ GrainNature-Throid 2 ½ Grain

2 ½ Grain (162.5 mg)

95 mcg T4, 22.5 mcg T3

Nature-Throid 3 GrainNature-Throid 3 Grain

3 Grain (195 mg)

114 mcg T4, 27 mcg T3

Nature-Throid 4 GrainNature-Throid 4 Grain

4 Grain (260 mg)

152 mcg T4, 36 mcg T3 Temporarily unavailable

Nature-Throid 5 GrainNature-Throid 5 Grain

5 Grain (325 mg)

190 mcg T4, 45 mcg T3 Temporarily unavailable


Nature-Throid Ingredients

Nature-Throid was formulated with the following ingredients:

Active Ingredient:

  • Thyroid USP* (desiccated porcine thyroid)

    *Lactose Monohydrate (Lactose is not added to our formula but it is already present in Thyroid USP raw material as a diluent per USP (United States Pharmacopeia). Lactose is not contraindicated for individuals with allergies to dairy, as lactose is a milk sugar (vs. dairy allergies, which are caused by proteins in milk). It is, however, contraindicated for individuals with lactose intolerance. We have had many physicians reporting no side effects while using Nature-Throid with lactose intolerant patients. The amount is very small – less than 5 mg. per 1 Grain vs. 12,000 – 15,000 mg. in a typical 8 fl. oz. glass of milk.)

Inactive Ingredients:

  • Colloidal Silicon Dioxide
  • Dicalcium Phosphate
  • Magnesium Stearate
  • Microcrystalline Cellulose
  • Croscarmellose Sodium
  • Stearic Acid
  • Opadry II 85F19316 Clear – tablet coating