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Mineral

Selenium

Selenium is an essential trace mineral that the body builds into proteins called selenoproteins. It comes from foods such as Brazil nuts, fish and grains.

FertilityLongevityOrgan FunctionImmune SupportCardiovascular

How much is too much?

EFSA’s adult upper limit is 255 µg daily from food and supplements combined, including during pregnancy and breastfeeding. It is a ceiling, not an intake goal. 1

What can excess selenium cause?

Long-term excess can cause hair loss, brittle nails, garlic-like breath, and digestive symptoms. 2

When is advice especially useful?

Kidney disease and conditions affecting nutrient absorption can alter selenium status. BfR advises discussing whether supplementation is needed with a doctor. 3

For information, not individual medical advice. Ingredient studies do not establish the effectiveness of these products.

Sources

  2. Selenium: Fact Sheet for Health Professionals NIH Office of Dietary Supplements