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National Agricultural Library
U.S. Department of Agriculture

Micronutrients

Learn about essential vitamins and minerals

Explore how micronutrients support metabolism, growth and overall health. Find links to nutrient databases, lists of food sources, Dietary Reference Intakes (DRIs), and educational resources on deficiency, toxicity and health impacts.

Featured Resources

USDA Choline Database

Agricultural Research Service's (ARS) USDA Database for the Choline Content of Common Foods contains information on the amounts of six choline metabolites in food.

See also: the ARS USDA National Fluoride Database of Selected Beverages and Foods

Micronutrients

Information about micronutrients and their roles in healthy growth and development from the Centers for Disease Control and Prevention.

Food Sources of Nutrients

DietaryGuidelines.gov's lists of foods and beverages provides information on calcium, vitamin D, potassium, and iron. Find information about sodium in their Cut Down on Sodium handout. (Also in Spanish/Español)

Dietary Reference Intakes

The National Academies' Dietary Reference Intakes (DRI) report contains information about micro- and macronutrient requirements. Updated DRIs for calcium and vitamin D and sodium and potassium are also available.

More About Micronutrients