Hormones

The Hormones category explains laboratory tests that assess endocrine function—TSH, Free T4/T3, cortisol, ACTH, LH, FSH, estradiol, testosterone, prolactin, insulin, and more—helping diagnose and monitor hormonal disorders.

FT3 (Free Triiodothyronine) test infographic comparing 4 symptoms of low FT3 and 4 symptoms of high FT3 with neat alignment and realistic medical icons in a clean beige-blue background.

FT3 (Free Triiodothyronine) Test – Normal Range, Function, and Causes of High & Low Levels

The FT3 (Free Triiodothyronine) test measures the active thyroid hormone in your blood. It helps diagnose thyroid disorders such as hyperthyroidism or hypothyroidism. Learn about normal ranges, causes, and symptoms of high or low FT3 levels and how it reflects your thyroid health.

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Professional medical infographic showing T4 (Thyroxine) test with two causes and two symptoms each for low and high T4 levels, featuring neat icons and a clean, blue-orange design.

T4 (Thyroxine) Test – Normal Range, Function, Causes of High & Low T4 Explained

The T4 (Thyroxine) test measures the level of thyroid hormone in the blood to assess thyroid function. Learn about normal ranges, causes, and symptoms of high or low T4 levels, and the importance of T4 in regulating metabolism and overall health.

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Clean, professional T3 test infographic comparing low vs high T3 levels with realistic thyroid-related icons, showing symptoms like fatigue, weight change, rapid heartbeat, and heat intolerance.

T3 (Triiodothyronine) Test – Normal Range, Function, High & Low T3 Levels Explained

The T3 (Triiodothyronine) test measures active thyroid hormone levels to evaluate thyroid function. Learn about its normal range, function, causes, and symptoms of high and low T3. This test helps diagnose hypothyroidism, hyperthyroidism, and other thyroid-related disorders.

T3 (Triiodothyronine) Test – Normal Range, Function, High & Low T3 Levels Explained Read More »