Free T3

chart-icon

Take advantage of our packages

The Free T3 is included in test packages, which you can buy at a lower price.

Free T3 (free triiodothyronine) is a measure of free circulating T3, excluding that which is bound to carrier proteins. This provides a more accurate measure of T3 levels because the carrier proteins can increase or decrease in various conditions artificially inflating or shrinking the total T3. T3 is discriminating for diagnosing and/or following the treatment of hyperthyroidism. It is not very useful at the low range of concentrations, so is not very helpful in diagnosing hypothyroidism. The thyroid delivers 20 times more T4 than T3, so T4 is the more relevant analyte except in special cases.

More arrow
clock-icon

Awaiting result:

One day

syringe-icon

Collect material:

Blood

sun-icon

Prepare:

Learn more
Purpose of the test

The Triiodothyronine (T3) test measures the level of T3 in the blood. T3 is one of the two primary hormones produced by the thyroid gland, with the other being thyroxine (T4). These hormones play a pivotal role in regulating the body's energy usage, controlling weight, body temperature, muscle strength, and the nervous system. The T3 hormone exists in two forms: bound T3 (attaches to protein) and free T3 (does not attach). The test can measure both forms (total T3 test) or just the free T3. Abnormal T3 levels can indicate thyroid disease.

Who Should Get Tested

A T3 test is primarily used to diagnose hyperthyroidism, where the body produces excessive thyroid hormone. The test is often ordered alongside T4 and TSH tests. It may also be used to monitor treatment for thyroid disease. Individuals showing symptoms of hyperthyroidism, such as anxiety, weight loss, tremors, increased heart rate, bulging eyes, sleep disturbances, fatigue, heat intolerance, and frequent bowel movements, might need a T3 test.

Preparing for the Test
Fasting
icon
Depending on the type of cholesterol test, you may be required to fast for 9 to 12 hours before the test. This means avoiding all food and drinks except water. Fasting is usually required for a lipid panel, which measures LDL and HDL cholesterol, and triglycerides.
Medications
icon
Inform your healthcare provider about any medications you are currently taking, including over-the-counter medications and supplements, as they can affect your test results.
Alcohol
icon
Avoid alcohol consumption for at least 24 hours before the test, as alcohol can raise triglyceride levels.
Exercise
icon
Avoid heavy exercise for 24 hours before the test, as this can also affect cholesterol and triglyceride levels.
Smoking
icon
Avoid smoking or using any nicotine products for at least 30 minutes before the test, as they can temporarily increase cholesterol levels.
Follow instructions
icon
Follow any specific instructions provided by your healthcare provider, such as the time of day to take the test or any dietary restrictions.
Interpreting Test Results

High total or free T3 levels may indicate hyperthyroidism, while low levels might suggest hypothyroidism. T3 test results are often analyzed in conjunction with T4 and TSH test results for a comprehensive diagnosis of thyroid disease. If there are concerns about the results, it's crucial to discuss them with a healthcare provider. During pregnancy, thyroid changes can occur, but T3 testing is usually not required unless specific conditions or symptoms are present.

AI-Powered Insights and Expert Validation
Advanced AI Interpretation
Diagu's AI system represents a breakthrough in medical test analysis, employing state-of-the-art algorithms meticulously trained on a vast spectrum of authoritative medical literature and data. This system intricately analyzes laboratory test results, extracting nuanced insights that might elude conventional methods. Our AI delves into complex interrelations between various health markers, offering a comprehensive understanding that supports accurate diagnosis and effective treatment planning. The foundation of our AI's analytical prowess lies in its extensive training, encompassing data from globally recognized medical journals, trusted healthcare databases, and breakthrough scientific studies. This ensures that every analysis is grounded in the latest and most comprehensive medical knowledge.
Expert Doctor Confirmation
While our AI provides deep analytical insights, the human touch remains indispensable. Every AI-generated interpretation is meticulously reviewed by experienced medical professionals, ensuring a harmonious blend of advanced technology and expert clinical judgment. This dual-layer approach guarantees that the insights provided are not only technologically sophisticated but also clinically relevant. Our medical experts ensure that the AI's interpretations align with current medical standards and practices, adding a layer of validation that only seasoned healthcare professionals can provide. This process reinforces the reliability of the test results, offering peace of mind to both patients and healthcare providers.
Language Model and Trusted Sources
At the core of Diagu's AI system is an advanced language model, engineered to transform complex medical data into clear, comprehensible, and informative descriptions. This model is adept at articulating detailed test analyses in a way that is accessible to both healthcare professionals and patients. The model's development involved the meticulous processing of high-quality sources, including reputable medical websites, renowned medical textbooks, and peer-reviewed research papers. This ensures that the language used in test descriptions is not only accurate and informative but also up-to-date with the latest medical findings and trends. By leveraging this rich tapestry of trusted sources, our AI system provides a deeper understanding of each test, fostering informed decision-making and enhanced patient care.