causes of high reverse T3 levels

High reverse T3 (rT3) occurs when the body converts too much thyroxine (T4) into its inactive form instead of the active hormone triiodothyronine (T3). This condition can contribute to hypothyroidism symptoms such as fatigue, brain fog, weight gain, and cold intolerance despite “normal” thyroid lab results. Elevated rT3 is often linked to stress, chronic illness, inflammation, nutrient deficiencies, liver dysfunction, adrenal fatigue, and prolonged dieting.

Understanding high rT3 levels is crucial for patients struggling with unresolved thyroid issues, especially when standard TSH, T3, and T4 tests do not explain persistent symptoms. Proper testing through a reverse T3 blood test can reveal hidden thyroid imbalances and help guide treatment options, such as addressing adrenal health, cortisol regulation, nutrient support, and lifestyle changes.

By learning the causes, symptoms, and treatment options for high reverse T3, patients can work with their healthcare provider to restore thyroid balance, improve metabolism, and regain energy.

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Suggested Internal SEO Links (link to your own content)

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Suggested External SEO Links (authority sources)

American Thyroid Association – Thyroid Hormones

National Library of Medicine – Reverse T3 and Thyroid Function

Endocrine Society – Thyroid Disorders