*The mineral selenium is essential for the body's natural production of [[Coenzyme Q10]].<br>
''== Natural sources of selenium :''<br>==
*Nuts (Brazil Nuts): Nuts, especially Brazil nuts, are a great source of selenium. Brazil nuts, which are also rich in [[magnesium]], provide the most selenium with 1917μg (2739% RDA) per 100 gram serving, 2550μg (3642% RDA) per cup, and 96μg (137% RDA) in a single kernel or nut. Mixed nuts by contrast provide about half as much selenium with 422μg (77% RDA) per 100 gram serving, 607μg (111% RDA) per cup, and 118μg (169% RDA) per ounce.
*Shellfish (Oysters, Mussels, Whelk): In addition to selenium oysters and shellfish are also a great source of iron, zinc, copper, and vitamin B12. Pacific oysters provide the most selenium with 154μg (220% RDA) per 100 gram serving, or 131μg (52% RDA) per ounce, and 38.5μg (55% RDA) per oyster. Other shellfish high in selenium include blue mussels and whelk which provide 90μg (128% RDA) of selenium per 100 gram serving, 76μg (109% RDA) per 3 ounce serving.