Most Frequently Requested Individual Tests

Description A cortisol test measures the level of cortisol in your blood, urine, or saliva to see if your levels are normal. Cortisol is a hormone ...

Description An estradiol test measures the amount of a hormone called estradiol in the blood. Estradiol is one of the main types of estrogens. In w...

Description A follicle-stimulating hormone (FSH) test measures the level of this hormone in a sample of your blood. A hormone is a chemical messeng...

Description Hepatitis is inflammation of the liver. Inflammation is swelling that happens when tissues of the body are injured or infected. Inflamm...

Description A homocysteine test measures the amount of homocysteine in a sample of your blood. Homocysteine is an amino acid. Amino acids are molec...

Description This test measures the level of parathyroid hormone (PTH) in your blood. PTH, is made by your parathyroid glands. They are four pea-siz...

Description A progesterone test measures the level of progesterone in a sample of your blood. Progesterone is a hormone that's made mainly by the o...

Description A prolactin (PRL) test measures the level of prolactin in a sample of your blood. Prolactin is a hormone produced by the pituitary glan...

Description Syphilis is a bacterial infection that is most often spread through sexual contact. Syphilis is a sexually transmitted infectious (STI)...

Vitamin B12, or cyanocobalamin, is a complex corrinoid compound containing four pyrrole rings that surround a single cobalt atom. Humans obtain vit...

Folates are compounds of pteroylglutamic acid (PGA) that function as coenzymes in metabolic reactions involving the transfer of single-carbon units...

A vitamin D test measures the level of vitamin D in your blood to make sure you have enough for your body to work well. Vitamin D is essential for ...