Selenium

Function

Neutralizes free radicals that may cause aging. Strengthens the immune system and prevents certain types of cancers. Works as a defense for oxidative stress.

Deficiency

Muscle weakness and fatigue

Food sources

Nuts (especially Brazils), whole grains, brown rice, seafood, poultry (especially organ meats), pork, beef

For therapeutic usage with a physician

Often taken because of its perceived anti-cancer and anti-aging properties

Toxic dose – symptoms

Fatigue, skin soars, hair loss, nail brittleness, dizziness, nausea, anxiety

AIs (Adequate Intakes)

Infants 0-6 months 7-12 months

Micrograms per Day 15 20

RDAs (Recommended Dietary Allowances)

Children 1-3 years 4-8 years	Micrograms per Day 20 30
Males 9-13 years 14-18 years 19-30 years 31-50 years 50-70 years > 70 years	- 40 55 55 55 55 55
Females 9-13 years 14-18 years 19-30 years 31-50 years 50-70 years > 70 years	- 40 55 55 55 55 55
Pregnancy < 19 years 19-30 years 31-50 years	- 60 60 60
Lactation < 19 years 19-30 years 31-50 years	- 70 70 70

Source: USDA Dietary Reference Intakes