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Vitamin B12 Test

Essential for energy, nerves and brain function

$69
Results in 2-3 business days2,300+ collection centresNo GP referral needed

1 in 5

older Australians may have suboptimal B12 status

Source: NHMRC Nutrient Reference Values

Why This Test

B12 deficiency can affect neurological and cognitive function — and is often correctable once identified. Levels in the lower-normal range (150–300 pmol/L) sit in what's sometimes called the 'grey zone'. If symptoms persist or B12 is borderline, adding MMA testing can help your healthcare practitioner clarify whether B12 is being utilised effectively at the cellular level.

What This Test Measures

Vitamin B12

Levels in the lower-normal range (150–300 pmol/L) sit in what's sometimes called the 'grey zone'. If symptoms persist or B12 is borderline, adding MMA testing can help your healthcare practitioner clarify whether B12 is being utilised effectively at the cellular level.

Who May Benefit

  • Fatigue despite adequate sleep
  • Pins and needles or numbness
  • Brain fog or memory issues
  • Mood changes
  • Vegetarian or vegan diet
  • Taking metformin or PPIs
Sample Type
Blood (venous)
Fasting
Not required
Best Time
Any time of day
Results
2-3 business days

Understanding Your Results

Below optimalWorth discussing with your healthcare practitioner - B12 is easily addressed
Low normalSuboptimal for some - discuss with your healthcare practitioner if symptomatic
OptimalYour B12 levels are healthy
Above rangeUsually not concerning, but worth noting
Your results come with personalised context and next steps. If anything needs attention, we'll guide you through what it means and suggest discussing with your doctor.

Common Questions

Yes. Supplements don't guarantee absorption. Testing confirms whether you're actually absorbing B12 effectively.

No fasting is required for B12 testing.

Serum B12 levels between 150–300 pmol/L are sometimes called a 'grey zone' — within the standard reference range, but where some people may still have inadequate cellular B12 utilisation. If symptoms persist in this range, your healthcare practitioner may add MMA testing for additional context.

Results are typically available in 2-3 business days via your dashboard.

Related Resources

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This test is relevant for:

Important Information

This test provides health information for educational purposes. Results should be discussed with your healthcare practitioner. Not a substitute for medical advice, diagnosis, or treatment.

NATA-accredited · 2,300+ collection centres

Vitamin B12
$69