Worried about Corona virus spreading in India? Buy Health Insurance and get coverage now. View Plans
Take informed decisions with IIFL Insurance:

What are the Normal Thyroid Levels? Know Everything

Arjun and Priya have been going to the doctors for a while. Finally, Priya’s test result came back indicating high thyroid levels. This was very concerning as normal thyroid levels are required for a healthy life. The doctor instructed Priya to follow a particular diet and medication to reduce the levels to normal for a better life. Priya took the advice and incorporated all the changes into her daily life. She felt better and happier through cutting out caffeine, which is terrible for people with high thyroid levels, which was difficult; she did it anyway. And now Priya has normal thyroid levels

What exactly is thyroid hormone?

The thyroid gland, a butterfly-shaped endocrine gland found in the lower front of the neck, produces thyroid hormone. Thyroid hormone is released into the bloodstream, delivered to all of the body’s tissues. It assists the body in using energy, staying warm, and keeping the brain, heart, muscles, and other organs functioning correctly; keeping normal thyroid levels is ideal.

Thyroid Hormone Concentrations

Thyroid hormone is available in two forms: thyroxine (T4) and triiodothyronine (T3) (T3). T4 is the most common type of thyroid hormone found in the blood (about 95 per cent). T4 is changed to T3 by removing an iodine atom to exercise its effects; this occurs mainly in the liver and particular tissues where T3 works, such as the brain. T3 is generally responsible for roughly 5% of thyroid hormone circulating in the blood.

Most thyroid hormone in the blood is bound by protein, leaving just a tiny percentage “free” to reach tissues and have physiologic effects. Total (protein-bound and free) or free hormone levels can be measured using thyroid testing.

What exactly is a TSH test?

Thyroid hormone blood tests are widely available and frequently utilised. Not all thyroid tests are applicable in all circumstances; they are used to check normal thyroid levels.

TSH Examine

The TSH (Thyroid Stimulating Hormone) level in a blood sample is the best technique to examine thyroid function at first. TSH fluctuations can operate as an “early warning system,” frequently happening before the body’s actual quantity of thyroid hormones gets too high or too low.

A high TSH level suggests that the thyroid gland is producing insufficient thyroid hormone (primary hypothyroidism). A low TSH level, on the other hand, typically indicates that the thyroid is releasing too much thyroid hormone (hyperthyroidism). A low TSH can occasionally be caused by a pituitary gland defect that prevents it from producing enough TSH to activate the thyroid (central hypothyroidism). To keep normal thyroid levels, it is essential to get tested. 

What exactly is a T4 test?

Total T4 testing determines the amount of bound and free thyroxine (T4) hormone in the blood. A Free T4 test determines what is not bound and may freely enter and alter human tissues.

What does an abnormal T4 level mean?

Significantly, drugs and medical disorders that alter thyroid hormone-binding proteins affect Total T4 levels. Estrogen, oral contraceptives, pregnancy, liver illness, and hepatitis C virus infection are all typical causes of elevated thyroid hormone-binding proteins, resulting in a Total high T4.

What exactly is a T3 test?

T3 tests assess the amounts of triiodothyronine (T3) in the blood. The bound and free fractions of triiodothyronine are measured in a Total T3 test. Total T3 levels are frequently increased in hyperthyroid individuals. T3 tests can be used to confirm a hyperthyroidism diagnosis and to assess the severity of hyperthyroidism.

What does it mean to have normal thyroid levels?

TSH and FT4 tests are often used to monitor thyroid hormone levels. A laboratory test’s typical result is obtained by testing the hormone in many healthy people and determining the normal reference range. Normal thyroid levels pushing may change significantly between laboratories, but average contents for popular tests are provided below. 

The typical range for FT4 is 0.7 to 1.9ng/dL. Individuals receiving thyroid hormone-modifying medicines and those with a history of thyroid cancer or pituitary dysfunction may benefit from a different normal FT4 range. Total T4 and T3 levels in the blood measure the amount of bound and free thyroid hormone, to see normal thyroid levels.


There are numerous alternatives if your thyroid is overactive:

  • To slow down your thyroid, you can use radioactive iodine.
  • Anti-thyroid drugs are used to keep the thyroid from overproducing hormones.
  • Beta-blockers are used to treat a fast heart rate induced by elevated thyroid levels.

It is essential to get help to attain normal thyroid levels. 

Buy Insurance - 18002101330