Metabolic
Biomarker

RDW

Included in Essential Labs
Why we test it
Red cell distribution width (RDW) measures variation in red blood cell size. Greater variation signals inflammation and oxidative stress, and has been independently linked to faster cognitive decline in aging.
BetterBrain target
< 13%
Elevated RDW has been linked to cognitive decline and dementia risk in large population studies.
What you Can do
  1. Mediterranean diet
  2. Omega-3 (fish oil)
  3. Vitamin B12
  4. Folate (methylated)
  5. Iron balance

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