Brazil Nuts

Nutritional and Health Benefits of Brazil Nuts (Bertholletia excelsa)

Brazil nuts (in Hebrew “אגוזי ברזיל”) are large, rich seeds from a tree that grows in the Amazon rainforest. They are famous mainly for being the most concentrated dietary source in nature of the mineral selenium.

A super source of selenium

A single Brazil nut may provide more than 100% of the recommended daily intake of selenium. Selenium is an essential trace mineral that serves as a cofactor for antioxidant enzymes (glutathione peroxidase) and is critical for proper immune function.

Thyroid support

The thyroid gland has the highest concentration of selenium in the body, and it is needed to produce thyroid hormones (T3) and to protect the gland from oxidative damage. Eating Brazil nuts may help prevent an underactive thyroid and related autoimmune conditions.

Healthy fats

Brazil nuts are rich in monounsaturated fatty acids (similar to olive oil) and polyunsaturated fatty acids. These fats are essential for heart health and for lowering “bad” cholesterol levels.

Antioxidants and anti-inflammatory properties

In addition to selenium, the nuts contain vitamin E (tocopherol) and phenols such as ellagic acid, which work together to reduce inflammation in the body and protect against oxidative stress.

Cognitive function

Adequate selenium levels are linked to improved brain function and prevention of cognitive decline. The nut’s antioxidant properties may protect brain cells from damage.

Summary

Brazil nuts are a nutritional powerhouse, providing first and foremost essential selenium. Because of the high concentration, it is recommended to eat them in moderation (1–3 nuts a day) to enjoy their benefits for the thyroid, heart and immune system without worrying about excess selenium.