Metabolic
Biomarker

MCV

Included in Essential Labs
Why we test it
Mean corpuscular volume (MCV) measures average red blood cell size. Small cells sometimes indicate iron deficiency; large cells often point to B vitamin deficiency or liver dysfunction, all with implications for brain health.
BetterBrain target
82-92 fL
Abnormal MCV can indicate B12, folate, or iron deficiency — all with direct brain health implications.
What you Can do
  1. Methylated B12 supplementation
  2. Folate (methylated)
  3. Iron-rich foods

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