Brazil nuts
For selenium intake and antioxidant support
Most of the experts we follow recommend it.
Brazil nuts are a potent source of selenium, supporting antioxidant defences and thyroid health.
Who is behind it
Voices including an Oxford metabolism PhD, a Harvard-trained gynecologist and a registered nutritional therapist.
How strong the research is
Mostly expert experience so far, with published research still catching up.
In their words
“You can add a brazil nut into your meal which is high in selenium, protecting you even further from the mercury and detoxifying it.”
a registered nutritional therapist
One Brazil nut contains the daily recommended allowance of selenium and randomized controlled trials show it can improve cognition in mild cognitive impairment.
Brazil nuts are one of the richest sources of selenium which supports thyroid function and testosterone levels
Selenium from Brazil nuts feeds the thyroid, calming it and clearing brain fog
Talk it through
Entrain shows what the experts teach, so you can make better decisions with your own clinician. It does not diagnose or prescribe. If something is worrying you, start there.
How this reading was made
Every line here comes from a doctor, scientist or coach speaking publicly, and links to the moment they said it. Entrain listens for where independent experts arrive at the same place on their own, and shows where they part ways. Mostly expert experience so far, with published research still catching up.
None of the statements here come with a declared commercial interest. Last refreshed 4 September 2026.
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