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Understand the 1-mg low-dose dexamethasone suppression test, the common cortisol cutoff of 1.8 mcg/dL, causes of nonsuppression, and the follow-up used for Cushing screening.

Low-Dose Dexamethasone Suppression Test: Cushing Syndrome Screening and Results

Learn how an 8–9 a.m. cortisol test screens for adrenal insufficiency, what low and intermediate results mean, how ACTH helps identify the cause, and when stimulation testing is needed.

Morning Cortisol Test: Low Levels, Adrenal Insufficiency, and Results

Learn how a pheochromocytoma and paraganglioma panel uses plasma or urine metanephrines, normetanephrine, catecholamines, and controlled collection to interpret abnormal results.

Pheochromocytoma and Paraganglioma Test Panel: Metanephrines, Normetanephrine, Catecholamines, and Results

Learn what plasma epinephrine, norepinephrine, and dopamine results mean, why collection posture matters, common causes of high values, and when metanephrine testing is preferred.

Plasma Catecholamines Test: Epinephrine, Norepinephrine, Dopamine, and Results

Learn how plasma free metanephrine and normetanephrine testing screens for pheochromocytoma and paraganglioma, why supine rest matters, and how high or borderline results are evaluated.

Plasma Free Metanephrines Test: Pheochromocytoma and Paraganglioma Screening, High Levels, and Results

Learn what a high plasma normetanephrine result means, why supine rest matters, common false-positive causes, when clonidine testing is used, and how PPGL evaluation proceeds.

Plasma Normetanephrine Test: High Levels, Pheochromocytoma Screening, and Results

Diagnostics

Home Diagnostics Page 25

Learn what a hepatic function panel measures, including ALT, AST, ALP, bilirubin, albumin, total protein, normal ranges, abnormal patterns, common causes, and when results need urgent care.

Hepatic Function Panel Test: Liver Enzymes, Bilirubin, Proteins, Normal Ranges, and...

High ALT usually means liver cell irritation or injury. Learn common causes, fatty liver patterns, warning signs, follow-up tests, and what ALT results can mean.

High Alanine Aminotransferase (ALT) Test: Causes, Liver Damage, Fatty Liver, and...

High albumin on a blood test usually points to dehydration or concentrated blood. Learn common causes, normal ranges, related lab patterns, and when follow-up or urgent care matters.

High Albumin Blood Test: Causes, Dehydration, and Meaning

Learn what a high albumin/globulin ratio means, including low globulin, dehydration, immune protein problems, protein loss, follow-up tests, and when to seek care.

High Albumin/Globulin (A/G) Ratio Test: Causes, Low Globulin, and Meaning

Understand high alkaline phosphatase (ALP) blood test results, including liver, bile duct, and bone causes, key lab patterns with GGT and bilirubin, follow-up tests, and when high ALP needs medical attention.

High Alkaline Phosphatase (ALP) Test: Causes, Liver, Bile Duct, Bone, and...

Learn what a high amylase blood test can mean, including pancreatitis, salivary gland disease, macroamylasemia, kidney issues, symptoms, follow-up tests, and when urgent care matters.

High Amylase Blood Test: Causes, Pancreatitis, Salivary Gland Disease, and Meaning

Learn what a high AST blood test means, including liver damage, fatty liver, alcohol, medications, muscle injury, rhabdomyolysis, follow-up tests, and urgent warning signs.

High Aspartate Aminotransferase (AST) Test: Causes, Liver Damage, Muscle Injury, and...

High ferritin with liver enzymes can signal inflammation, fatty liver disease, alcohol-related liver stress, or iron overload. Learn how transferrin saturation, ALT, AST, GGT, bilirubin, and follow-up testing help clarify the cause.

High Ferritin and Liver Enzymes: Interpreting Inflammation, Fatty Liver, and Iron...

High globulin blood test results can signal inflammation, infection, liver disease, autoimmune disease, dehydration, or monoclonal gammopathy. Learn causes and follow-up tests.

High Globulin Blood Test: Causes, Inflammation, Infection, Liver Disease, and Meaning

High total protein blood test results can come from dehydration, inflammation, infection, liver disease, or high globulin patterns. Learn what albumin, globulin, and the A/G ratio mean and when follow-up testing matters.

High Total Protein Blood Test: Causes, Dehydration, Inflammation, and Meaning

Learn what a high trypsinogen blood test can mean, including pancreatitis, pancreatic duct problems, chronic pancreas disease, cystic fibrosis screening, symptoms that need urgent care, and follow-up tests.

High Trypsinogen Blood Test: Causes, Pancreatitis, Pancreas Disease, and Meaning

Learn what the hyaluronic acid blood test measures, why high levels may suggest liver fibrosis, how normal ranges vary, and how results are interpreted with liver panels, ELF, FIB-4, and elastography.

Hyaluronic Acid Blood Test: High Levels, Liver Fibrosis Marker, Normal Range,...

Understand the indirect bilirubin blood test, normal range, high indirect bilirubin causes, hemolysis patterns, Gilbert syndrome, jaundice clues, and follow-up labs.

Indirect Bilirubin Blood Test: High Indirect Bilirubin, Normal Range, Hemolysis, and...

Learn what the LDH isoenzymes test measures, how LDH-1 through LDH-5 patterns relate to liver, muscle, heart, lung, pancreas, kidney, and blood cell damage, and how results are interpreted with other blood tests.

LDH Isoenzymes Test: Liver, Heart, Muscle, Blood Cell Damage, and Results

Learn how to interpret lipase and amylase blood tests, including high and low results, pancreatitis patterns, mild elevations, non-pancreas causes, and when urgent care is needed.

Lipase and Amylase: Interpreting Pancreas Blood Tests

Learn what a lipase blood test measures, what high or low lipase can mean, how results relate to pancreatitis, normal ranges, urgent symptoms, and follow-up testing.

Lipase Blood Test: High Lipase, Normal Range, Pancreatitis, Pancreas Disease, and...

Understand liver function tests, including ALT, AST, ALP, GGT, bilirubin, and albumin, with clear explanations of normal ranges, abnormal patterns, common causes, follow-up testing, and urgent warning signs.

Liver Function Tests (LFTs) Panel: ALT, AST, ALP, GGT, Bilirubin, Albumin,...

Learn what a low ALT blood test can mean, including vitamin B6 deficiency, low muscle mass, aging, nutrition issues, liver health patterns, and when follow-up is needed.

Low Alanine Aminotransferase (ALT) Test: Causes, Vitamin B6, Liver Health, and...

Low albumin blood test results can point to liver disease, kidney protein loss, inflammation, malnutrition, gut protein loss, or fluid overload. Learn what the pattern means and which follow-up tests matter.

Low Albumin Blood Test: Causes, Liver Disease, Kidney Loss, Malnutrition, and...

Learn what a low albumin/globulin ratio means, including common causes such as liver disease, inflammation, kidney protein loss, infection, autoimmune disease, malnutrition, and high globulin.

Low Albumin/Globulin (A/G) Ratio Test: Causes, Liver Disease, Inflammation, and Meaning

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