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Micronutrient
Vitamins and minerals the body needs in tiny amounts to function.
Concepts
Definition
Micronutrients are the vitamins and minerals the body needs in milligram or microgram amounts — iron, calcium, vitamin D, the B vitamins, zinc and many more. They do not supply energy but enable the reactions that release and use it, build bone and blood, and keep the immune and nervous systems working. A varied diet covers most needs; specific gaps, such as vitamin D in low-sun months or iron in some diets, may need attention.
Related terms
Macronutrient
The three nutrients the body needs in large amounts: protein, carbohydrate and fat.
Antioxidant
Compounds that neutralise reactive molecules; best obtained from whole foods.
Electrolyte
Minerals like sodium and potassium that carry the body's electrical signals.
Source: Standard references on vitamins and minerals. · checked 2026-09-04
Frequently asked questions
What is micronutrient?
Micronutrients are the vitamins and minerals the body needs in milligram or microgram amounts — iron, calcium, vitamin D, the B vitamins, zinc and many more. They do not supply energy but enable the reactions that release and use it, build bone and blood, and keep the immune and nervous systems working. A varied diet covers most needs; specific gaps, such as vitamin D in low-sun months or iron in some diets, may need attention.
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