Lab Guide

How to read your lab results

Blood test reports are full of acronyms and reference ranges that are rarely explained. This guide breaks down common biomarkers in plain English — what each one measures, the normal range, and what a high or low result can mean. Find your value below.

Medically reviewed by Antonieta Rueda, MD and Kyle R. Toth, MD

Good to know: Reference ranges vary between laboratories. Always compare your result to the range printed on your own report, and discuss abnormal values with your healthcare provider.

Popular lab result guides

Start with these commonly searched values, or browse the complete library below.

Browse all biomarkers

Triglycerides

Lipids

Triglycerides

LDL

Lipids

Cholesterol Low-Density Lipoprotein

HDL

Lipids

Cholesterol High-Density Lipoprotein

Leukocyte Esterase

Urinalysis

Urinalysis

TSH

Thyroid

Thyroid-Stimulating Hormone

Immature Granulocytes

Blood count

Blood Test

ALT

Liver

Alanine Aminotransferase

Free T4

Thyroid

Thyroxine

Squamous Epithelial Cells

Urinalysis

in Urine

Non-HDL

Lipids

Cholesterol

Absolute Neutrophils

Blood count

Absolute Neutrophil Count ANC

ALP

Liver

Alkaline Phosphatase

WBC

Blood count

White Blood Cell Count

VLDL

Lipids

Cholesterol

Bilirubin

Liver

Bilirubin

Urine Urobilinogen

Urinalysis

Urobilinogen in Urine

Estradiol

Hormone

E2

Iron Saturation

Iron

Transferrin Saturation

Urine Specific Gravity

Urinalysis

Urine Specific Gravity

Ferritin

Iron

Blood Test

AMH

Hormone

Anti-Müllerian Hormone

NRBC

Blood count

Nucleated Red Blood Cells

TPO Antibodies

Thyroid

Thyroid Peroxidase TPO Antibodies

BNP

Cardiac

B-type Natriuretic Peptide

Chloride

Electrolytes

Blood Test

A1C

Metabolic

Hemoglobin A1C

Troponin

Cardiac

Troponin

TB Blood Test

Immune

IGRA / QuantiFERON

Anion Gap

Electrolytes

Blood Test

A/G Ratio

Liver

Albumin/Globulin Ratio

SHBG

Hormone

Sex Hormone Binding Globulin

RPR

Immune

Rapid Plasma Reagin

Urine Nitrites

Urinalysis

Nitrites in Urine

CO2

Electrolytes

Carbon Dioxide / Bicarbonate

Eosinophils

Immune

Blood Test

Globulin

Liver

Blood Test

eGFR

Kidney

Estimated Glomerular Filtration Rate

TgAb

Thyroid

Thyroglobulin Antibodies

Hyaline Casts

Urinalysis

Urinalysis

ApoB

Lipids

Apolipoprotein B

Urine pH

Urinalysis

Urine pH

BUN/Creatinine Ratio

Kidney

BUN/Creatinine Ratio

Folate

Blood count

Vitamin B9

MCHC

Blood count

Mean Corpuscular Hemoglobin Concentration

Basophils

Immune

Blood Test

Lipase

Metabolic

Blood Test

TIBC

Iron

Total Iron-Binding Capacity

Total Protein

Liver

Blood Test

DHEA-S

Hormone

ulfate DHEA-S

CK

Metabolic

Creatine Kinase

Occult Blood

Urinalysis

in Urine

Hemoglobin

Blood count

Blood Test

Albumin

Liver

Blood Test

Platelets

Blood count

Blood Test

MCH

Blood count

Mean Corpuscular Hemoglobin

MCV

Blood count

Mean Corpuscular Volume

IgE

Immune

Immunoglobulin E

Condition lab guides

Interpreting blood work for a specific condition? These guides explain which tests are used and what the results mean.

Understand your own results

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