All lab testsVitamins & Nutrients
Vitamin and mineral status drives energy, mood, immunity, and recovery. Test the markers that matter — Vitamin D, B12, iron, ferritin, magnesium, and more — and get clear, lab-verified numbers in 1-3 business days.
30 options in this category · browse every category
30 tests & panels
Essential for nerve function, energy production, and red blood cell formation. Deficiency is common.
$49 at other labs
$19.99
+ $6 lab processing fee
The definitive vitamin D test — an estimated 42% of American adults are deficient.
$75 at other labs
$36.99
+ $6 lab processing fee
Not just your B12 level — whether your cells can use it
$193 at other labs
$79.99
+ $6 lab processing fee
Are you getting what you need? Find out.
$350 at other labs
$189.99
+ $6 lab processing fee
The three most commonly deficient vitamins — checked
$169 at other labs
$89.99
+ $6 lab processing fee
Measures biotin levels — important for hair, skin, nail health, and metabolism.
$79 at other labs
$59.99
+ $6 lab processing fee
Measures blood calcium — important for bone health, muscle function, and nerve signaling.
$52 at other labs
$16.99
+ $6 lab processing fee
Measures ionized calcium — the free, biologically active form of calcium in your blood, separate from the total calcium reported on a metabolic panel.
$52 at other labs
$29.99
+ $6 lab processing fee
Measures ceruloplasmin, the main copper-carrying protein in blood — ordered alongside a copper level to evaluate Wilson's disease, copper deficiency, and unexplained liver or neurological findings.
$29.99
+ $6 lab processing fee
Measures copper levels — an essential trace mineral for iron metabolism, nerve function, and connective tissue.
$59 at other labs
$31.99
+ $6 lab processing fee
Measures CoQ10 — a powerful antioxidant essential for energy production and statin users.
$99 at other labs
$74.99
+ $6 lab processing fee
Essential B vitamin for DNA synthesis, cell division, and preventing neural tube defects in pregnancy.
$65 at other labs
$21.99
+ $6 lab processing fee
Measures the body's master antioxidant — critical for detoxification, immune function, and cellular protection.
$119.99
+ $6 lab processing fee
Measures iodine levels — essential for thyroid hormone production and metabolism.
$52 at other labs
$38.99
+ $6 lab processing fee
Essential mineral for muscles, nerves, and sleep — up to 50% of Americans don't get enough.
$25 at other labs
$18.99
+ $6 lab processing fee
Red-blood-cell magnesium — a more sensitive measure of your body's true magnesium stores than the standard serum test.
$45 at other labs
$26.99
+ $6 lab processing fee
The confirmatory test for vitamin B12 deficiency — MMA rises early, before B12 levels look clearly low.
$99 at other labs
$48.99
+ $6 lab processing fee
Measures bone formation activity — a key marker for osteoporosis monitoring, bone metabolism, and vitamin K status.
$89 at other labs
$66.99
+ $6 lab processing fee
Measures phosphorus — works with calcium for bone health and energy metabolism.
$29 at other labs
$16.99
+ $6 lab processing fee
Measures selenium — an antioxidant mineral important for thyroid function and immune health.
$109 at other labs
$55.99
+ $6 lab processing fee
Measures retinol levels — essential for vision, immune function, and skin health.
$49 at other labs
$43.99
+ $6 lab processing fee
Measures thiamine levels — essential for energy metabolism and nerve function.
$59 at other labs
$43.99
+ $6 lab processing fee
Tests both B12 and folate together — two vitamins that work together for blood and nerve health.
$50 at other labs
$36.99
+ $6 lab processing fee
Measures riboflavin levels — involved in energy production and cellular function.
$66.99
+ $6 lab processing fee
Measures pyridoxine levels — important for brain function, mood, and amino acid metabolism.
$69 at other labs
$50.99
+ $6 lab processing fee
Measures ascorbic acid levels — important for immune function, collagen production, and antioxidant protection.
$49 at other labs
$44.99
+ $6 lab processing fee
Measures the active form of Vitamin D — essential for evaluating kidney disease, calcium disorders, and sarcoidosis.
$99 at other labs
$59.99
+ $6 lab processing fee
Measures alpha-tocopherol — a key fat-soluble antioxidant that protects cells from oxidative damage.
$69 at other labs
$37.99
+ $6 lab processing fee
Measures vitamin K — essential for blood clotting and bone metabolism.
$59 at other labs
$36.99
+ $6 lab processing fee
Important for immune function, wound healing, and testosterone production.
$35 at other labs
$26.99
+ $6 lab processing fee
Not sure where to start?
Answer 4 quick questions and we'll recommend the right panel — plus add-ons to round out your results.
100+ tests available. No subscription. HSA / FSA accepted.
Vitamin and mineral deficiencies are common, mostly silent, and easy to confirm with the right test — but there is no single “vitamin test”. Vitamin D, B12, iron (ferritin) and folate account for the large majority of deficiencies found in adults, and each has a specific marker. The table matches the usual reasons people look for a vitamin test — fatigue, tingling, hair loss, bone health, a plant-based diet, a medication known to deplete a nutrient — to the test that answers them.
All of these are standard blood draws at Quest or Labcorp (iodine is a urine test), most with no fasting and results in 1–4 business days. If you already take a supplement, the result reflects it; test before starting, or tell the interpreting clinician, when you want a true baseline.
| If you want to… | Order | Why |
|---|---|---|
| Fatigue, low mood, bone or muscle aches, limited sun exposure | Vitamin D, 25-Hydroxy$36.99 · single test | 25-hydroxy vitamin D is the only test that shows vitamin D status |
| Numbness or tingling, memory changes, plant-based diet, metformin or acid reducers, age over 60 | Vitamin B12$19.99 · single test | Serum B12 is the first-line test; borderline results go to MMA |
| A borderline B12 result or symptoms despite a normal B12 | Methylmalonic Acid (MMA)$48.99 · single test | MMA confirms deficiency at the tissue level |
| The full B12 question in one draw | Comprehensive B12 Deficiency Panel$79.99 · 3 tests | B12, methylmalonic acid and homocysteine together |
| Anemia work-up, pregnancy planning, heavy alcohol use | Vitamin B12 & Folate$36.99 · single test | B12 and folate deficiencies look alike on a blood count and are treated differently |
| Muscle cramps, palpitations, migraines, diuretics or PPIs | Magnesium, RBC$26.99 · single test | Red-cell magnesium reflects tissue stores better than serum |
| Hair loss, slow wound healing, frequent infections, loss of taste | Zinc$26.99 · single test | Zinc deficiency is common with restricted diets and GI conditions |
| A broad first check of the common deficiencies | Vitamin Deficiency Test Panel (D, B12 & Folate)$89.99 · 3 tests | Vitamin D, B12 and folate together |
| A comprehensive vitamin and mineral status check | Vitamin & Mineral Deficiency Panel (9 Nutrients)$189.99 · 9 tests | Adds magnesium, zinc, ferritin, calcium, copper and selenium |
| Thyroid symptoms with a low-iodine or dairy-free diet | Iodine$38.99 · single test | Urine iodine reflects recent intake |
Four dominate. Vitamin D deficiency affects a large share of adults, more in winter, at northern latitudes, with darker skin and with obesity. Vitamin B12 deficiency rises with age (stomach acid falls), with metformin and acid-suppressing medication, after stomach or bowel surgery, and on vegan diets; it can damage nerves before it causes anemia. Iron deficiency is the most common nutritional deficiency worldwide, driven by menstruation, pregnancy, blood loss and low intake, and is measured with ferritin rather than a vitamin panel. Folate deficiency is now uncommon where flour is fortified but still appears with alcohol use, malabsorption and some medications. Magnesium and zinc deficiency are less common but real, particularly with GI disease, diuretics, proton-pump inhibitors and restricted diets. Deficiencies of vitamins A, C, E and K are rare in people eating a varied diet and are tested when a specific condition raises the question.
A single test is the efficient choice when the question is focused: vitamin D for limited sun or bone health, B12 for tingling or a plant-based diet, ferritin for fatigue with heavy periods. A panel earns its price when symptoms are non-specific and several deficiencies are plausible — fatigue, hair shedding, brain fog, muscle cramps — or when a diet, surgery or medication puts several nutrients at risk at once. The Basic Vitamin Deficiency Panel covers vitamin D, B12 and folate; the Vitamin & Mineral Deficiency Panel adds magnesium, zinc, ferritin, calcium, copper and selenium. Neither includes every vitamin, because testing rare deficiencies in people without a reason for them produces more false alarms than answers.
Guidelines are cautious about routine screening in healthy adults — the Endocrine Society, for example, does not recommend testing vitamin D in adults without risk factors — so testing is most useful when there is a symptom, a risk factor or a supplement to check.
Reference ranges describe the population, not adequacy, so several vitamins have decision thresholds inside the printed range: vitamin D below 20 ng/mL is deficient and 20–29 insufficient even though some labs print 30–100 as normal; B12 between 200 and 300 pg/mL is a gray zone that MMA resolves; ferritin under 30 ng/mL means depleted iron stores even when the report's lower limit is lower. High values almost always reflect supplements. Each biomarker page — vitamin D, vitamin B12, folate, magnesium, zinc — explains its range, the thresholds and what high and low results suggest. Supplement doses and forms are decided with a clinician; a retest after about three months confirms a low level has responded.
There is no single test. Vitamin D (25-hydroxy), vitamin B12, folate and ferritin (iron stores) cover the common deficiencies; magnesium RBC and zinc are added for cramps, hair loss or GI conditions. The Basic and comprehensive vitamin deficiency panels bundle these.
Yes. Order online, a licensed physician reviews the order, and you have blood drawn at a nearby Quest or Labcorp. Results appear in your portal in 1–4 business days with reference ranges and plain-language interpretation.
Most vitamin tests do not require fasting. Iron and homocysteine are more reliable fasting, and a morning draw is a reasonable default if the order includes tests that do need it.
Not necessarily — the result then shows your level on the supplement, which is often the question. If you want a true baseline, test before starting, or tell the interpreting clinician what you take. Stop high-dose biotin for two days before any test because it interferes with many assays.
They overlap and are non-specific: fatigue, low mood, hair shedding, brittle nails, muscle cramps or weakness, tingling or numbness, poor concentration, frequent infections, slow healing and bone or joint aches. That overlap is why a test, not a symptom checklist, settles which nutrient is low.
Vitamin D takes about three months on a steady dose to plateau; ferritin needs roughly three months of iron to refill stores; B12 metabolic markers normalize within weeks, with nerve symptoms improving over months. A retest at about three months confirms the response.
Educational only — not a diagnosis. Discuss any result outside the reference range with a clinician.