🧪 Reverse T3 – Understanding Thyroid Hormone Imbalance
Reverse T3 (rT3) is an inactive form of the thyroid hormone T3 that your body produces under stress, illness, or calorie restriction. It acts as a brake on metabolism by blocking active T3 at the cellular level. While it doesn’t reflect your thyroid gland’s output directly, it can reveal why you may still feel tired, foggy, or have trouble losing weight — even when TSH and Free T3 levels appear normal.
High rT3 levels can be seen in:
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Chronic stress or illness
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Nutrient deficiencies
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Inflammatory states or after surgery
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Overmedication with thyroid hormone
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