Vitamin B12
What It Is
Vitamin B12 is essential for nerve function, red blood cell formation, and DNA synthesis.
Why It Matters
B12 deficiency is common, particularly in vegetarians and older adults, and can cause anaemia and neurological problems.
If Levels Are High
Very high B12 is usually due to supplementation and is rarely a concern.
If Levels Are Low
Low B12 can cause fatigue, tingling, cognitive difficulties, and megaloblastic anaemia.
Preparation
No special preparation required.
How Often to Test
Annually, or more frequently if at risk (e.g., vegan diet, metformin use).
Panels Including This Marker
Tired All The Time
48 Hours · 47 markers
Sports Performance
48 Hours · 72 markers
Lifestyle Screen
48 Hours · 36 markers
Anaemia Profile
Next Day · 21 markers
Nutritional Health
48 Hours · 47 markers
Nutritional & Digestive Health
48 Hours · 36 markers
+ 2 more panels
Test Your Vitamin B12 Levels
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Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.