Blood test results explained
Typical ranges, what raises or lowers each result, and how to prepare, in plain English.
HbA1c (Hemoglobin A1c)Your average blood sugar over about three months.Fasting Blood GlucoseYour blood sugar after at least 8 hours without food.Total CholesterolAll the cholesterol carried in your blood.LDL CholesterolThe cholesterol most linked to artery plaque.HDL CholesterolThe cholesterol that helps clear the rest.TriglyceridesThe main type of fat circulating in your blood.TSH (Thyroid-Stimulating Hormone)The brain signal that tells your thyroid how hard to work.Free T4 (Free Thyroxine)The active thyroid hormone circulating in your blood.Serum CreatinineA waste product your kidneys filter out.eGFR (Estimated Glomerular Filtration Rate)An estimate of how well your kidneys filter blood.Hemoglobin (Hb)The protein in red blood cells that carries oxygen.Vitamin D (25-Hydroxy)Your body’s vitamin D stores.Vitamin B12A vitamin your nerves and blood cells depend on.FerritinA blood protein that reflects your stored iron.ALT (Alanine Aminotransferase)A liver enzyme that rises when liver cells are stressed.Uric AcidThe waste product behind gout and some kidney stones.Platelet CountThe blood cells that help you clot.White Blood Cell (WBC) CountThe infection-fighting cells in your blood.C-Reactive Protein (CRP / hs-CRP)A blood marker of inflammation.Serum CalciumThe mineral behind bones, nerves and muscle.
Information only. This page is general education, not medical advice. Reference ranges differ between labs, ages and sexes, and only a clinician who knows your history can interpret your results. Read the full disclaimer.