Selenium, along with other minerals, can help boost white blood cells, which improves the body's ability to fight illness and infection. A few studies suggest that selenium might help prevent some infections, such as a bacterial skin infection that often occurs with lymphedema, and mycoplasma pneumonia.
Because they are rich in antioxidants, Brazil nuts also reduce total cholesterol, improve the immune system and help prevent some types of cancer, such as breast, prostate and colon.
Brazil nuts contain heart-healthy fatty acids, such as polyunsaturated fats, and are rich in antioxidants, minerals, and fiber. All of these nutrients may help lower your risk of heart disease. Research has indicated that Brazil nuts may improve or reduce: vascular inflammation.