Vitamin A (Retinol) (Quest Diagnostics)
Vitamin A is critical for vision, growth, and many cell functions. High concentrations of Vitamin A are seen with renal failure, but this is not associated with toxicity and excessive ingestion. High concentrations are associated with bone fractures. Low concentrations of Vitamin A are consistent with fat malabsorption and are rarely due to inadequate diet.
Vitamin A is needed for growth and for strong bones and teeth. As you grow older, it helps keep your skin and eyes healthy. Vitamin A is present in liver, fish liver oils, dairy products, dark green and yellow-orange vegetables, and in fruits. Too much vitamin A may cause symptoms that include headache, itchy skin, and hair loss.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions: Overnight fasting is required. Fasting is defined as no consumption of food or beverage other than water for at least 8 hours before testing.
Estimated turnaround for results is 5 business days.
Vitamin A, Serum (LabCorp
Vitamin A is needed for growth and for strong bones and teeth. As you grow older, it helps keep your skin and eyes healthy. Vitamin A is present in liver, fish liver oils, dairy products, dark green and yellow-orange vegetables, and in fruits. Too much vitamin A may cause symptoms that include headache, itchy skin, and hair loss.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions: Patient should fast for 12 hours and abstain from alcohol for 24 hours prior to collection. Blood should be collected before breakfast in the morning and prior to any medication.
Vitamin D, 25-Hydroxy LC/MS/MS (Quest Diagnostics)
The Vitamin D, 25-Hydroxy test is primarily ordered to measure the amount of 25-hydroxy vitamin in the bloodstream to rule out Vitamin D deficiency.
Measurement of serum 25-OH vitamin D concentrations provide a good index of circulating vitamin D activity in patients not suffering from renal disease. Lower than normal 25-OH vitamin D levels can result from a dietary deficiency, poor absorption of the vitamin or impaired metabolism of the sterol in the liver. A 25-OH vitamin D deficiency can lead to bone diseases such as rickets and osteomalacia. Above normal levels can lead hypercalcemia. This assay employs liquid chromatography tandem mass spectrometry to independently measure and report the two common forms of 25-hydroxy vitamin D: 25OH D3 - the endogenous form of the vitamin and 25OH D2 - the analog form used to treat 25OH Vitamin D3 deficiency.
A significant deviation from the normal range may require further evaluation by your physician.
Alternative Names(s):
Vitamin D2, 25-hydroxy, 25-Hydroxyergocalciferol (25OHD2), Vitamin D3, 25-hydroxy, D2 Vitamin, 25-Hydroxyvitamin D3, 25-OH-D3, 25-Hydroxycholecalciferol (25OHD3), 25-OH-D2, D3 Vitamin, 25-Hydroxyvitamin D2
Patient Instructions: Fasting preferred, but not required.
Estimated turnaround for results is 5 business days. If confirmation testing is required, the estimated time may be extended.
Vitamin D, 25-Hydroxy (LabCorp)
The Vitamin D, 25-Hydroxy test is primarily ordered to measure the amount of 25-hydroxy vitamin in the bloodstream to rule out Vitamin D deficiency.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions: Vitamin D, 25-Hydroxy is not the same as calcitriol or 1,25 dihydroxy. Calcitriol/Vitamin D, 1,25 Dihydroxy must be ordered separately.
Vitamin D, 1,25-Dihydroxy, LC/MS/MS (Quest Diagnostics)
This test is used to measure the bio-active form of Vitamin D. This test is also used in the differential diagnosis of hypocalcemia and to monitor patients with renal osteodystrophy or chronic renal failure.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions:
Vitamin D, 1,25 Dihydroxy (LabCorp)
This test is not the same as vitamin D3 (25-hydroxy vitamin D3). Vitamin D3 must be ordered separately. Aid in the diagnosis of primary hyperparathyroidism, hypoparathyroidism, pseudohypoparathyroidism, renal osteodystrophy, vitamin D resistant rickets
Patient Instructions: No isotopes administered 24 hours prior to venipuncture. Vitamin D, 1,25 Dihydroxy is not the same as vitamin D3 (25-hydroxy vitamin D3). Vitamin D3 25-hydroxy must be ordered separately.
Estimated turnaround for results is 5 business days. If confirmation testing is required, the estimated time may be extended.
Vitamin B12 (Quest Diagnostics)
The Vitamin B12 test is used to aid in the diagnosis of anemia and to determine overall nutritional health. Vitamin B12 is decreased in pernicious anemia, total or partial gastrectomy, malabsorption and certain congenital and biochemical disorders.
A significant deviation from the normal range may require further evaluation by your physician.
Alternative Names(s):
Cobalamin, Cyanocobalamin, B12
Patient Instructions:
Vitamin B12 (LabCorp)
The Vitamin B12 test is used to aid in the diagnosis of anemia and to determine overall nutritional health.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions: Fasting specimen preferred; must draw before Schilling test, transfusions or B12 therapy is started.
Vitamin B12 and Folates (Quest Diagnostics)
The Vitamin B12 test is used to aid in the diagnosis of anemia, determine overall nutritional health and screen for folate deficiency.
Folic acid deficiency is common in pregnant women, alcoholics, patients with diets that do not include raw fruits and vegetables, and people with structural damage to the small intestine. The most reliable and direct method of diagnosing folate deficiency is the determination of folate levels in both erythrocytes and serum. Low folic acid levels, however, can also be the result of a primary Vitamin B12 deficiency that decreases the ability of cells to take up folic acid. Vitamin B12 is decreased in pernicious anemia, total or partial gastrectomy, malabsorption and certain congenital biochemical disorders.
Significant deviations from the normal range may require further evaluation by your physician.
Alternative Name(s):
Cobalamin, Vitamin B12/Folic Acid
Patient Instructions:
Vitamin B12 and Folates (LabCorp)
The Vitamin B12 test is used to aid in the diagnosis of anemia, determine overall nutritional health and screen for folate deficiency.
Significant deviations from the normal range may require further evaluation by your physician.
Patient Instructions: This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H or coenzyme R). It is recommended to stop biotin consumption at least 72 hours prior to the collection of specimen.
Magnesium, Serum (Quest Diagnostics)
The Serum Magnesium test measures the amount of magnesium in your blood. Magnesium is needed for your nervous, gastrointestinal, and cardiovascular systems to work normally. Your body gets magnesium from certain foods. Magnesium measurements are used in the diagnosis and treatment of hypomagnesemia (abnormally low plasma levels of magnesium) and hypermagnesemia (abnormally high plasma levels of magnesium). Magnesium is decreased in chronic nephritis, acute pancreatitis, and alcoholic cirrhosis. It is increased in acute or chronic renal failure and Addison's Disease.
A significant deviation from the normal range may require further evaluation by your physician.
Alternative Names(s): MAG
Patient Instructions:
Magnesium, Serum (LabCorp)
The Serum Magnesium test measures the amount of magnesium in your blood. Magnesium is needed for your nervous, gastrointestinal, and cardiovascular systems to work normally. Your body gets magnesium from certain foods. A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions:
Magnesium, RBC (Quest Diagnostics)
Magnesium is an essential trace element. Deficiency leads to irritability, neuromuscular abnormalities, cardiac and renal damage. Its salts are used as antacids and cathartics. Excessive amount may cause CNS depression, loss of muscle tone, respiratory and cardiac arrest.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions: Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection. You should always consult the physician prescribing your medication before you stop taking the medication for any reason, including taking lab tests.
Estimated turnaround for results is 4 business days.
Magnesium, RBC (LabCorp)
Evaluate magnesium deficiency. A Magnesium RBC test can provide an earlier detection of Magnesium deficiency than a standard Magnesium, Serum test. When Magnesium levels are low, the body pulls Magnesium from the cells in order to keep blood levels normal. In this case, a Magnesium, Serum test may show normal levels while a Magnesium RBC test will give a more accurate result.
This test is usually ordered if someone is experiencing symptoms associated with Magnesium deficiency such as weakness or cramping in the muscles, confusion, cardiac arrhythmias or seizures. Magnesium levels are usually checked if someone has a disorder which affects the kidneys. It it also ordered to monitor people who are taking Magnesium supplements.
Patient Instructions:
Zinc (Quest Diagnostics)
Zinc is an essential element involved in a myriad of enzyme systems including wound healing, immune function, and fetal development. Zinc measurements are used to detect and monitor industrial, dietary, and accidental exposure to zinc. Also, zinc measurements may be used to evaluate health and monitor response to treatment.
A significant deviation from the normal range may require further evaluation by your physician.
Alternative Name(s):
ZN, Plasma
Patient Instructions:
Zinc, Plasma or Serum (LabCorp)
This test is used to monitor exposure to zinc; evaluate suspected nutritional inadequacy, especially in enteral or parental nutrition, critically ill or burn patients; cases of diabetes or delayed wound healing; growth retardation; follow therapy, for example when higher intravenous zinc doses are used to balance excessive ongoing GI losses in long-term total parenteral nutrition; follow oral zinc therapy in Wilson disease; confirm acrodermatitis enteropathica and follow therapy.
A significant deviation from the normal range may require further evaluation by your physician.
Patient Instructions:
Vitamin/Nutrient Panel (Quest Diagnostics)
The Vitamin/Nutrient Panel is used to check the levels of the vitamins and minerals listed below. In addition to the listed vitamins and minerals, a Complete Blood Count and Comprehensive Metabolic Profile are included in the panel.
Patient Instructions: Patient should fast for 12-14 hours before collection of the specimen. Specimens should be collected in the morning since iron values decrease by 30% during the course of the day and there can be significant interference from lipemia. Fasting is defined as no consumption of food or beverage other than water for at least 12 hours before testing. In patients receiving therapy with high biotin doses (ie, > 5 mg/day), no sample should be taken until at least eight hours after the last biotin administration; must draw before Schilling test, transfusions or B12 therapy is started. Patient should not have vitamins containing folic acid during the previous three to five days; if so, consult physician before discontinuing.
Estimated turnaround for results is 7-8 business days.
Vitamin/Nutrient Panel (LabCorp)
The Vitamin/Nutrient Panel is used to check the levels of the vitamins and minerals listed below. In addition to the listed vitamins and minerals, a Complete Blood Count and Comprehensive Metabolic Profile are included in the panel for a basic assessment of general wellness.
Patient Instructions: Patient should fast for 12-14 hours before collection of the specimen. Must draw before Schilling test, transfusions or B12 therapy is started. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample. Vitamin D, 25-Hydroxy is not the same as calcitriol or 1,25 dihydroxy. Calcitriol/Vitamin D, 1,25 Dihydroxy must be ordered separately.
Estimated turnaround for results is 7-8 business days. If confirmation testing is required, the estimated time may be extended.
