Just 2 Brazil Nuts a Day May Support Thyroid Health, Metabolism, and Blood Sugar adminonOctober 3, 2026

what the science actually says.

Why Brazil Nuts Are So Powerful

Brazil nuts come from the Amazonian tree Bertholletia excelsa. Although they contain healthy fats, protein, magnesium, zinc, vitamin E, and other nutrients, their standout feature is their exceptionally high selenium content.

According to the National Institutes of Health, a single Brazil nut may contain around 68–91 micrograms of selenium,although the exact amount can vary considerably depending on where the nuts were grown.

For perspective, the recommended dietary allowance for selenium for most adults is 55 micrograms per day.