Toxin
Biomarker

Selenium

Available as add-on
Why we test it
Selenium supports selenoproteins, antioxidant enzymes that protect neurons. It's essential in small quantities but toxic at higher concentrations, so optimal levels matter more than supplementing.
BetterBrain target
100-150 µg/L
Both deficiency and excess affect brain health. Optimal levels support selenoproteins that protect neurons from oxidative damage.
What you Can do
  1. Brazil nuts (1-2/day)
  2. Selenium-rich foods (tuna
  3. eggs
  4. sardines)
  5. Selenium supplementation (if deficient)

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