June 19, 2025An IgG blood test measures immunoglobulin G, the most common antibody in your blood and the main carrier of your…
June 19, 2025An IgA blood test measures immunoglobulin A, the most abundant antibody guarding the moist linings of your gut, airways, and…
June 19, 2025A procalcitonin test measures a protein in your blood, called procalcitonin (PCT), that climbs quickly when your body fights a…
June 19, 2025An ESR blood test, short for erythrocyte sedimentation rate, is one of the oldest and most widely ordered laboratory tests…
June 19, 2025A CRP blood test measures C-reactive protein, a substance your liver releases into the bloodstream whenever there is inflammation somewhere…
June 19, 2025An IgM blood test measures immunoglobulin M, the first antibody your immune system produces when it meets a new germ.…
June 19, 2025An estradiol blood test measures how much estradiol — often written as E2 — is circulating in your blood. Estradiol…
June 19, 2025An ACTH blood test measures adrenocorticotropic hormone, a chemical messenger made by your pituitary gland that tells your adrenal glands…
June 19, 2025A calcitonin blood test measures a hormone made by specialized cells in your thyroid gland, and it often appears on…
June 19, 2025An IGFBP-3 blood test measures insulin-like growth factor binding protein 3, the main carrier protein for a growth factor called…
June 19, 2025An IGF-1 blood test measures the amount of insulin-like growth factor 1 in your blood, a hormone that mirrors how…
June 19, 2025A TSH blood test is one of the most common ways to check how well your thyroid is working, and…
June 19, 2025An aldosterone test measures the amount of aldosterone, a hormone made by your adrenal glands, in a sample of your…
June 18, 2025A complement C3 blood test measures the amount of a protein called C3, one of the main players in your…
June 18, 2025Complement C4 is a protein of the immune system, and a complement C4 blood test measures how much of it…
June 18, 2025Serum tryptase is a blood test that measures an enzyme released by mast cells, the immune cells that drive allergic…
June 18, 2025Antinuclear antibodies (ANA) are proteins the immune system makes that, by mistake, target the body's own cell nuclei instead of…
June 18, 2025Anti-CCP antibodies are proteins made by the immune system that, in most people who have them, point strongly toward rheumatoid…
June 18, 2025Anti-TPO antibodies are proteins that the immune system makes against thyroid peroxidase, an enzyme your thyroid gland needs to build…
June 18, 2025Microalbuminuria is the presence of small amounts of albumin — a protein that normally stays in your blood — in…
June 18, 2025A chloride blood test measures the amount of chloride, a charged mineral known as an electrolyte, circulating in your blood.…
June 18, 2025A magnesium blood test measures the amount of magnesium circulating in your blood, a mineral your muscles, nerves, and heart…
June 17, 2025A vitamin B6 blood test measures how much of this essential nutrient is circulating in your blood, almost always in…
June 17, 2025A vitamin B12 blood test measures how much of this essential nutrient, also known as cobalamin, is circulating in your…
June 17, 2025A haptoglobin blood test measures a protein your liver makes to capture and clear the hemoglobin that leaks out of…
June 17, 2025A ferritin blood test measures ferritin, the protein your body uses to store iron, and it is one of the…
June 17, 2025Serum iron is the amount of iron circulating freely in your blood, and it often appears on a routine blood…
June 17, 2025If you just received lab results showing a low or high bicarbonate value, you likely have questions about what a…
June 17, 2025Phosphorus levels in your blood reveal how well your body manages one of its most essential minerals, one that works…
June 17, 2025Corrected calcium is the value doctors use when a standard total calcium result might be misleading because of an abnormal…