About Selenium
Plant foods, such as vegetables, are the most common dietary sources of selenium. How much selenium is in the vegetables you eat depends on how much of the mineral was in the soil where the plants grew.
Fish, shellfish, red meat, grains, eggs, chicken, liver, and garlic are all good sources of selenium. Meats produced from animals that ate grains or plants found in selenium-rich soil have higher levels of selenium.
Brewer's yeast, wheat germ, and enriched breads are also good sources of selenium.
Females age 14 and older: 55 mcg/day
Effects of a Selenium Overdose
A selenium overdose can occur as the result of a single, large dose or from taking too much of it on a daily basis. Even though it may seem like a harmless mineral, selenium can cause some dangerous side effects, especially if an overdose occurs. Although some of these overdose effects do not appear to be serious, they can be signs of selenium toxicity. These effects include but are not limited to:
* Hair and nail brittleness
* A metallic taste in the mouth
* "Garlic" breath odor
* Fatigue
* Irritability
* Weight loss
* Muscle tenderness
* Nausea, vomiting, and abdominal (stomach) pain
* White, horizontal streaking of the fingernails
* Hair loss
* Shakiness
* Flushing (redness) of the face
* Cardiac arrest
* Heart failure
* Death.