Metabolic, Vitamins & Minerals Guides
Blood sugar, cholesterol, vitamins, minerals, and metabolic markers.
A1C Test: Normal Range, Diabetes Levels, and How to Order
An A1C test shows average blood sugar over 2 to 3 months. Learn normal ranges, prediabetes cutoffs, cost, and how to order online.
A1c Levels: What Is a Dangerous A1c and Normal Range
A1c levels show average blood sugar over two to three months. Learn the normal range, what counts as a dangerous A1c, and how to order an A1
ALT Blood Test: What Alanine Transaminase Levels Mean
An ALT blood test measures alanine transaminase, a liver enzyme. Learn normal ALT ranges, what high ALT means, common causes, and how to ord
Amino Acid Test: Plasma and Urine Amino Acid Profile
An amino acid test measures the building blocks of protein in blood or urine. Learn what a plasma amino acid profile shows, cost, and how to
Ammonia Levels: Normal Range, High Results, and Testing
Ammonia levels rise when the liver cannot clear this waste product. Learn the normal range, causes of high ammonia, symptoms, and how to get
Amylase Test: Normal Range, High Levels, and How to Order
An amylase test measures a digestive enzyme linked to the pancreas. Learn normal amylase levels, what high amylase means, cost, and how to o
Anemia Testing Guide: Iron, Ferritin, B12, and CBC Tests
Anemia testing uses iron, ferritin, B12, and CBC tests to find the cause of fatigue. Learn ranges, symptoms, costs, and how to order anemia
Anion Gap Blood Test: What High and Low Levels Mean
An anion gap blood test checks the balance of charged particles in your blood. Learn the normal range, what a high or low anion gap means, a
Beta Carotene Test: Levels, Normal Range, and Cost
A beta carotene test measures this vitamin A precursor. Learn normal carotene levels, what high and low results mean, and how to order testi
Bilirubin Test: Normal Levels and Dangerous Bilirubin Ranges
A bilirubin test checks how well your liver clears bile. Learn normal bilirubin levels, what a dangerous bilirubin level is, and how to orde
Blood Test for Dehydration: Electrolytes, BUN, and Results
A dehydration blood test checks electrolytes, kidney markers, and BUN to gauge fluid balance. Learn what abnormal results mean and how to or
C-Peptide Test: Levels, Normal Range, and What Results Mean
A C-peptide test shows how much insulin your pancreas makes. Learn normal ranges, what high or low levels mean, and how to order the blood t
Calcium Blood Test: Normal Range, High and Low Causes
A calcium blood test reveals parathyroid, vitamin D, and kidney balance. Learn normal ranges, high and low causes, cost, and how to order th
Candida Overgrowth Test: What the Evidence Really Says
Candida overgrowth is not a recognized diagnosis in most people who suspect it. Learn what candidiasis really is, which tests apply, and how
Carnitine Test: Levels, Deficiency, and How to Order
A carnitine test measures total and free carnitine in blood or urine. Learn normal ranges, carnitine deficiency causes, and how to order tes
Chromium Test: Blood and Urine Levels, Ranges, and Cost
A chromium test measures this trace mineral in blood or urine. Learn typical ranges, what high or low results mean, who should test, cost, a
Cobalt Test: Normal Range, High Levels, and How to Order
A cobalt test measures this trace element in blood or urine. Learn normal cobalt levels, what high cobalt means, who should test, and how to
Comprehensive Vitamin Panel: What It Tests and How to Order
A comprehensive vitamin panel measures multiple vitamins at once. Learn what it checks, normal ranges, what deficiencies mean, cost, and how
Copper Blood Test: Normal Range and What High/Low Levels Mean
A copper blood test measures this essential trace mineral. Learn the normal range, causes of high and low copper, related tests, and how to
Diabetes Testing Guide: A1C, Glucose, and Insulin Tests
Diabetes testing uses A1C, glucose, and insulin tests to detect prediabetes and diabetes. Learn ranges, symptoms, costs, and how to order te
Electrolyte Panel: Sodium Normal Range and Low Sodium Causes
An electrolyte panel checks sodium and other minerals. Learn the sodium normal range, what low and high sodium mean, and how to order the te
Fatty Liver Testing Guide: ALT, GGT, and CMP Explained
Fatty liver testing uses ALT, GGT, and CMP blood tests to spot liver stress early. Learn which tests matter, symptoms, cost ranges, and how
Ferritin Test: Normal Range, High and Low Levels Explained
A ferritin test measures stored iron and catches deficiency early. Learn normal ranges, high and low meaning, cost, and how to order.
Folate Test: Deficiency Signs, Normal Range, and How to Order
A folate test measures folic acid and folate in blood. Learn normal ranges, deficiency signs, causes of low folate, and how to order a folat
Gout Testing Guide: Uric Acid Levels and Diagnosis
Gout testing centers on uric acid blood tests plus kidney markers. Learn normal uric acid ranges, flare symptoms, cost ranges, and how to or
Heavy Metals Test: Lead, Mercury, and Toxin Panels Explained
A heavy metals test screens for lead, mercury, arsenic, and cadmium. Learn symptoms, test types, result meaning, cost, and how to order.
High Blood Pressure Tests: Lab Work and How to Order
High blood pressure tests help find organ and metabolic causes. Learn which labs matter, what they show, and how to order them without a doc
High Cholesterol Testing: Lipid Panel, ApoB, and Lp(a)
High cholesterol testing starts with a lipid panel and may add ApoB or Lp(a). Learn what each marker means, normal ranges, costs, and how to
Homocysteine Test: Normal Range, High Levels, and How to Order
A homocysteine test checks an amino acid tied to heart risk and B-vitamin status. Learn normal ranges, high causes, cost, and how to order.
Insulin Resistance Test: Fasting Insulin, Glucose, HOMA-IR
An insulin resistance test checks fasting insulin, glucose, and A1c. Learn normal ranges, HOMA-IR, early warning signs, cost, and how to ord
Iodine Test: Normal Range, Deficiency Signs, and How to Order
An iodine test checks this essential mineral, usually with a 24-hour urine collection. Learn normal ranges, deficiency and excess signs, and
Iron Infusion Side Effects and Iron Level Testing Guide
Learn common iron infusion side effects, how iron and ferritin tests are used, normal iron ranges, and how to order iron testing without a d
Iron Panel Test: Normal Ranges, Results, and How to Order
An iron panel checks ferritin, serum iron, and transport proteins together. Learn normal ranges, what high and low results mean, cost, and h
Iron and Anemia Tests: Ferritin, Iron Panel, and CBC Guide
Iron and anemia tests reveal low iron, B12, or chronic disease causes. Learn ferritin and CBC ranges, deficiency patterns, cost, and how to
Lipase Test: Normal Range, High Levels, and How to Order
A lipase test measures a pancreatic enzyme and is the preferred marker for pancreatitis. Learn normal lipase levels, what high lipase means,
Liver Enzymes Test: ALT, AST, and GGT Normal Ranges
A liver enzymes test measures ALT, AST, and GGT. Learn normal ranges, what elevated results mean, common causes, and how to order testing.
Liver Function Tests: ALT, AST, GGT Ranges and What They Mean
Liver function tests check ALT, AST, GGT, bilirubin, and albumin. Learn normal ranges, abnormal patterns, cost, and how to order a liver pan
Liver Health Testing Guide: ALT, GGT, CMP, and Ammonia
Liver health testing covers ALT, GGT, CMP, and ammonia. Learn what abnormal liver tests mean, symptoms to watch, costs, and how to order tes
Magnesium Forms Compared: Citrate, Glycinate, and More
Magnesium citrate, glycinate, and oxide are not the same. Learn how the forms differ, which is best for your goal, and what a magnesium bloo
Magnesium Test: Normal Range, Deficiency Signs, and Cost
A magnesium test checks a mineral vital for muscle, nerve, and heart health. Learn normal ranges, deficiency signs, test types, and cost.
Manganese Test: Blood and Urine Levels, Ranges, and Cost
A manganese test measures this trace mineral in blood or urine. Learn typical ranges, what high or low results mean, who should test, cost,
Metabolic Syndrome Tests: A1C, Lipids, and Insulin
Metabolic syndrome tests check A1C, cholesterol, and fasting insulin. Learn the criteria, which labs matter, and how to order testing withou
Osteoporosis Testing: Vitamin D, Calcium, and PTH Tests
Osteoporosis testing uses vitamin D, calcium, and PTH blood tests alongside bone scans. Learn which tests matter, normal ranges, costs, and
Potassium Test: Normal Range, High and Low Levels, and Cost
A potassium test checks this key electrolyte for heart and muscle function. Learn normal ranges, what high and low potassium mean, cost, and
Prediabetes Testing Guide: A1C, Glucose, and Insulin Tests
Prediabetes testing uses A1C, fasting glucose, and insulin to catch rising blood sugar early. Learn normal ranges, who should test, and how
Selenium Test: Normal Levels, Deficiency, and How to Order
A selenium test measures this trace mineral in blood or urine. Learn normal levels, deficiency signs, and how to order selenium testing onli
Trace Mineral Test: What a Mineral Panel Checks and Costs
A trace mineral test checks essential minerals like zinc, copper, and selenium. Learn what a mineral panel measures, normal ranges, who shou
Uric Acid Crystals: Normal Range, Gout, and How to Test
Uric acid crystals form when levels run high. Learn the normal uric acid range, how it links to gout, and how to order a uric acid blood tes
Urine Glucose Test: Glycosuria Causes, Normal Range, Cost
Glucose in urine, called glycosuria, can point to high blood sugar or a kidney leak. Learn the normal range, causes, and how to order a urin
Vitamin A Test: Deficiency Signs, Normal Range, and Cost
A vitamin A test checks retinol status for vision and immunity. Learn normal ranges, deficiency and excess signs, test cost, and how to orde
Vitamin B1 Test: Thiamin Levels, Deficiency Signs, and Cost
A vitamin B1 test checks thiamin status before deficiency harms nerves or heart. Learn ranges, deficiency signs, who should test, cost, and
Vitamin B12 Test: Normal Range, Deficiency Signs, and Cost
A vitamin B12 test detects deficiency before nerve damage sets in. Learn normal ranges, borderline results, causes of low B12, cost, and how
Vitamin B2 Test: Riboflavin Levels, Deficiency, and Cost
A vitamin B2 test checks riboflavin status when mouth sores or fatigue appear. Learn normal ranges, deficiency causes, cost, and how to orde
Vitamin B5 Test: Pantothenic Acid Levels and Deficiency
A vitamin B5 test measures pantothenic acid, a vitamin used for energy metabolism. Learn normal ranges, deficiency signs, cost, and how to o
Vitamin B6 Test: Normal Range, Symptoms, and How to Order
A vitamin B6 test measures pyridoxal 5-phosphate in blood. Learn normal ranges, signs of low or high B6, and how to order a B6 test online n
Vitamin C Test: Normal Range, Deficiency Signs, and Cost
A vitamin C test measures ascorbic acid in blood or urine. Learn normal ranges, deficiency signs, what high and low levels mean, cost, and h
Vitamin D Test: Normal 25-OH Levels, Deficiency, and Cost
A vitamin D test measures 25-OH levels to detect deficiency. Learn sufficient vs low bands, causes of deficiency, cost, and how to order the
Vitamin D vs D3: Forms, Differences, and How to Test
Vitamin D2 and D3 are not identical forms. Learn how they differ, what the 25-hydroxy vitamin D test measures, normal ranges, and how to ord
Vitamin Deficiency Test: Panels, Symptoms, and How to Order
A vitamin deficiency test checks B12, vitamin D, folate, and more. Learn deficiency symptoms, which panel to choose, and how to order testin
Vitamin K Test: Levels, Clotting Role, Deficiency, and Cost
A vitamin K test checks the nutrient behind normal blood clotting and bone health. Learn what low vitamin K means, who should test, cost, an
Zinc Test: Normal Range, Deficiency Symptoms, and How to Order
A zinc test checks this essential mineral for immunity and healing. Learn normal ranges, deficiency symptoms, copper interaction, cost, and
eGFR Blood Test: What Your Kidney Function Number Means
An eGFR blood test estimates how well your kidneys filter waste. Learn what eGFR measures, normal ranges, what low eGFR means, and how to or
Ready to get tested? Order online through our partner and visit a local lab near you. No doctor's order or insurance required.
Order Lab Tests OnlineReviewed by the LabAppointments Editorial Team
Our team researches and fact-checks all content to ensure accuracy. We update guides regularly to reflect current testing options, pricing, and laboratory accreditation standards.