Thyroxine (T4) is the main hormone your thyroid makes. Your thyroid hormones are important because they control how your body uses energy from the food you eat. (Photo Credit: iStock/Getty Images) T4 ...

Dr. Omar Al-Heeti is an assistant professor of medicine at Southern Illinois University and practices internal medicine with a specialty in infectious diseases. He received his medical degree from the ...

Please provide your email address to receive an email when new articles are posted on . Researchers created thyroid function reference ranges adjusted for age, sex and racial-ethnic background. Using ...

Most thyroid tests don’t require any special preparation. However, the radioactive iodine uptake scan requires you to abstain from certain foods and medications for up to several weeks. If a doctor ...

The following are at-home tests that can help a person monitor their liver health. People need to contact their doctor if they receive a test result indicating they may have reduced liver function. A ...