OGTT and A1c: Interpreting Prediabetes and Diabetes Testing
The oral glucose tolerance test and A1c are both used to evaluate blood sugar, but they look at glucose control from different angles. A1c...
Oral Glucose Tolerance Test (OGTT): Normal Range, Diabetes Diagnosis, Gestational Diabetes, and Results
The oral glucose tolerance test, often shortened to OGTT, shows how your blood sugar responds after you drink a measured amount of glucose. It...
Postprandial Glucose and A1c: Interpreting After-Meal Blood Sugar
Postprandial glucose is your blood sugar after eating, and A1c is a longer-term average of glucose exposure over about 3 months. Looking at them...
Proinsulin Blood Test: High Proinsulin, Insulin Production, Diabetes Risk, and Results
Proinsulin is the unfinished form of insulin. Your pancreas makes proinsulin inside beta cells, then splits it into insulin and C-peptide before releasing it...
Pyruvate Blood Test: Lactate-to-Pyruvate Ratio, Metabolic Disorders, and Results
A pyruvate blood test measures pyruvate, a small molecule made when the body breaks down glucose for energy. Doctors rarely order pyruvate by itself....
Random Blood Glucose Test Normal Range: Reference Values and Meaning
A random blood glucose test measures the amount of glucose, or sugar, in your blood at the moment the sample is taken. Unlike a...
Two-Hour Postprandial Glucose Test: Normal Range, High After-Meal Glucose, Diabetes, and Results
A two-hour postprandial glucose test measures how much glucose remains in your blood about two hours after eating. It gives a snapshot of how...
Uric Acid and Insulin Resistance: Interpreting Metabolic Risk Patterns
Uric acid is often thought of only as a gout marker, but it can also add useful context to metabolic health. A mildly high...
5′-Nucleotidase Test: High Levels, Normal Range, Cholestasis, Bile Duct Disease, and Results
The 5'-nucleotidase test is a blood test that helps show whether an elevated alkaline phosphatase result is more likely coming from the liver and...
Alanine Aminotransferase (ALT) Normal Range: Reference Values and Meaning
Alanine aminotransferase, usually shortened to ALT, is a liver enzyme measured on many routine blood panels. ALT helps liver cells process amino acids, but...
Albumin and INR: Interpreting Liver Synthetic Function
Albumin and INR help show how well the liver is making important blood proteins. Albumin is a protein made by the liver that helps...
Albumin Blood Test Normal Range: Reference Values and Meaning
An albumin blood test measures the amount of albumin, the main protein in the liquid part of your blood. Albumin is made by the...
Albumin/Globulin (A/G) Ratio Normal Range: Reference Values and Meaning
The albumin/globulin ratio, often written as the A/G ratio, compares two major groups of proteins in the blood: albumin and globulins. A typical adult...
Alkaline Phosphatase (ALP) Normal Range: Reference Values and Meaning
Alkaline phosphatase, often shortened to ALP, is an enzyme measured in blood to help assess liver, bile duct, and bone activity. Many people first...
ALP and GGT: Interpreting Liver vs Bone Alkaline Phosphatase Patterns
Alkaline phosphatase (ALP) is one of the most useful blood markers for spotting a liver, bile duct, or bone pattern, but it is also...
Alpha-1 Antitrypsin (A1AT) Blood Test: Low A1AT, Deficiency, Liver Disease, Lung Risk, and Results
Alpha-1 antitrypsin, often shortened to A1AT or AAT, is a protective protein made mainly by the liver and released into the bloodstream. Its best-known...
ALT and AST: Interpreting Liver Enzymes Without Overdoing It
ALT and AST are liver enzymes that often rise when liver cells are irritated, inflamed, or injured. They are useful warning lights, but they...
ALT vs AST: What Is the Difference in Liver Blood Tests?
ALT and AST are two liver enzymes often reported together on a liver panel, but they do not tell the same story. ALT is...
Amylase Blood Test Normal Range: Reference Values and Meaning
An amylase blood test measures the amount of amylase enzyme circulating in your blood. Amylase helps digest starches and other carbohydrates, and most of...
APRI Score Test: AST-to-Platelet Ratio Index, Liver Fibrosis Score, Calculator, and Results
The APRI score is a simple liver fibrosis score calculated from two common blood test results: AST and platelet count. It was developed to...