Quest Diagnostics Vitamin B12 & Folate Test
Type
Blood Testing
Biomarkers
3
Duration
30 min
Results
4 days
Measures vitamin B12 and folate levels in blood, essential for red/white blood cells, nervous system, tissue repair, and DNA creation.
Vitamin B12 and folate are crucial nutrients for red and white blood cell production, nervous system health, tissue and cell repair, and DNA synthesis. The body doesn't produce these vitamins; they must be obtained through diet or supplements. Deficiency can result from inadequate intake, poor absorption, age, medical conditions, or medications. Low levels can lead to anemia, nervous system issues, high homocysteine, and various health problems. This test helps identify deficiencies.
Key Details
- Nutrients Tested
- 1–30+ (varies by panel)
- Fasting Required
- Varies by specific test
- Sample Type
- Blood draw
- Turnaround
- 2–5 business days
- Common Use
- Deficiency screening, supplementation guidance
Who Is This For?
Vegetarians and vegans (at higher risk of B12, iron, and zinc deficiency). Older adults, as nutrient absorption decreases with age. Anyone on restrictive diets or with digestive conditions affecting absorption. People experiencing unexplained fatigue, brain fog, poor wound healing, or hair loss. Athletes with high nutrient demands from training.
What's Included
Preparation Required
Fasting for 8–10 hours is recommended for some nutrient tests but not all — check with your provider. Continue taking your regular supplements unless told otherwise (the test measures your steady-state levels). Morning draws are preferred for consistent results.
Biomarkers Tested
3Essential for nerve function, DNA synthesis, and red blood cell formation. B12 deficiency can cause anemia, neuropathy, fatigue, and cognitive impairment. Common in vegans, vegetarians, older adults, and those taking metformin or acid-reducing medications.
Vitamin B9 (Folate) is crucial for DNA synthesis and repair. Low levels can lead to anemia and other health issues.
Essential for DNA synthesis, cell division, and red blood cell formation. Folate deficiency causes megaloblastic anemia and, during pregnancy, increases the risk of neural tube defects. Works closely with vitamin B12.
+ $6.00 Physician Service Fee
- Category
- Diagnostic
- Sample Type
- Blood draw
- Duration
- 30 min
- Results
- 4 days