Why Am I Gaining Weight on Armour Thyroid?

Armour Thyroid, a medication used to treat a condition called hypothyroidism, aims to reduce or eliminate hypothyroid symptoms such as weight gain. An inadequate dosage, however, may allow weight gain and other symptoms of an underactive thyroid to continue or worsen.


According to Medical News Today, hypothyroidism, an imbalance in the body’s thyroid hormone, causes weight gain, aches and pains, muscle weakness and high cholesterol.

How It Affects Your Metabolism

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Because the main function of thyroid hormone is to regulate the body's metabolic processes, an underactive thyroid often equates a slow metabolism and weight gain.

Armour Thyroid

According to Armour Thyroid’s website, the company's hormone-replacement tablets can boost low thyroid levels in hypothyroid patients. The company creates its tablets from the thyroid glands of pigs.

Weight Gain

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The Armour Thyroid website says that its product mimics normal human thyroid hormone, so an incorrect dosage could influence weight gain.


If you experience weight gain while taking Armour Thyroid, tell your endocrinologist or other doctor about your symptoms and ask if your dose might require adjustment.