Nutrients
Optimal
Vitamin B12
Vitamin B12. A vitamin you only get from animal foods or supplements, needed for nerves, energy and making red blood cells.
Sample result · Nov 2026
Optimal 400 to 900
540
pg/mL
+140 in 1 year
200
400
700
1000
TREND · SAMPLE MEMBER
From 400 to 540 in a year.
Comfortably in range.
Optimal 400 to 900
Vitamin B12
First test
400
pg/mL · Nov 2024
Latest
540
pg/mL · Nov 2026
Change
+35
% over 7 tests
Next test
Nov
2027 · in 12 months
WHAT IT MEASURES
B12 helps make DNA, red blood cells and the coating around your nerves. Your liver stores a few years’ worth.
WHY IT MATTERS
Low B12 causes tiredness, tingling and brain fog. Plant-based diets and some medications raise the risk.
WHEN TO RETEST
Yearly, or every six months on a plant-based diet.
WHAT MOVES IT
Five levers, ranked.
Based on clinical evidence. Your clinician picks the ones that fit you.
Animal foods
Fish, eggs, dairy and meat.
Fortified foods
Plant milks and cereals with B12.
Supplement if vegan
250 µg a day covers most people.
Check medications
Metformin and antacids lower B12.
Gut health
Absorption needs a healthy stomach.
RELATED MARKERS
Usually read together.
Know your
Vitamin B12.
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