What T3 levels indicate hypothyroidism?

Low T3 levels can be observed in hypothyroidism, but more often this test is useful in the diagnosis and management of hyperthyroidism, where T3 levels are elevated. Normal range: 100 – 200 ng/dL (nanograms per deciliter of blood).

What is the normal range of free T3?

Normal Results The range for normal values are: Total T3 — 60 to 180 nanograms per deciliter (ng/dL), or 0.92 to 2.76 nanomoles per liter (nmol/L) Free T3 — 130 to 450 picgrams per deciliter (pg/dL), or 2.0 to 7.0 picomoles per liter (pmol/L)

What is a normal T3 uptake level?

Normal T3 Uptake Levels Always talk with your doctor to learn more about your test results. For adults, the normal range for T3 uptake is about 25-35% [3]. As mentioned earlier, the T3 uptake % is not clinically useful without a total T4 test as well. The free T4 index can be calculated using T3 uptake and total T4.

What does high triiodothyronine T3 mean?

If your results show high total T3 levels or high free T3 levels, it may mean you have hyperthyroidism. Low T3 levels may mean you have hypothyroidism, a condition in which your body doesn’t make enough thyroid hormone. T3 test results are often compared with T4 and TSH test results to help diagnose thyroid disease.

What are the symptoms of low T3 levels?

The following are other symptoms that may indicate too little T3 and T4 in your body (hypothyroidism):

  • Trouble sleeping.
  • Tiredness and fatigue.
  • Difficulty concentrating.
  • Dry skin and hair.
  • Depression.
  • Sensitivity to cold temperature.
  • Frequent, heavy periods.
  • Joint and muscle pain.

What does a low free T3 indicate?

Abnormally low levels of T3 may indicate hypothyroidism or starvation. It could also indicate that you have a long-term illness since T3 levels decrease when you’re sick. If you’re sick enough to be hospitalized, your T3 levels are likely to be low.

How can I increase my T3 levels naturally?

Eat Enough Zinc and Selenium

  1. Foods rich in zinc: oysters, beef, crab, pumpkin seeds, cashews, and chickpeas.
  2. Foods rich in selenium: brazil nuts, tuna, halibut, sardines, turkey, and beef liver.

Why is my body not converting T4 to T3?

Disruptions in gut health as seen in dysbiosis (an imbalance of gut bacteria), inflammatory bowel disease, or leaky gut may reduce your body’s ability to convert T4 into the active T3 hormone.

What causes low T3 and T4 levels?

Causes of Low T3 Levels: Both Primary and Secondary Hypothyroidism causes low T3 and T4 levels. Some patients may even show normal levels of T4. In patients suffering from some psychological or physical stress, T4 is excessively converted into reverse T3 (rT3).

What causes a high reverse T3?

Prolonged stress and toxicity are the major causes of reverse T3 dominance. Unrelenting stress results in high levels of cortisol , the main hormone released by the adrenal glands in response to stress.

Why does low T3 cause weight gain?

Bottom line: Low levels of T3 and high levels of reverse T3 cause a condition known as thyroid resistance. This condition results in weight gain due to a reduction in your basal metabolic rate. One of the easiest (though not the most accurate ways) to assess for hormone imbalances is by assessing the distribution of fat on your body.

What does it mean to have high T3 T4?

High levels of all three of these, tsh , t3, ( liothyronine) and t4, is due to the pituitary gland causing too much tsh, which causes the thyroid to make too much T3 (liothyronine) and t4. Normally, high T3 (liothyronine) and T4 will cause the TSH to be low, but high levels of all 3 suggest a possible pituitary tumor making too much tsh.