Vitamin

Vitamin D

Vitamin D (cholecalciferol/D3) supports normal immune function and the maintenance of healthy bones, teeth and muscles. In northern climates, supplementation is widely advised in autumn and winter.

Benefits

Supports normal immune function
Maintains bones, teeth and muscles
Helps calcium absorption

How to take it

Adults are commonly advised 10µg (400 IU) daily; many supplements provide 25µg (1000 IU). Do not exceed the recommended dose.

Cautions

Speak to a pharmacist if you take other medicines or have a medical condition.
Very high doses over long periods can be harmful.

FAQs

When should I take vitamin D?

Any time of day, ideally with a meal containing some fat to aid absorption.

Do I need vitamin D in summer?

Most people make enough from sunlight in summer; supplementation is most useful in autumn and winter.

Related: Vitamin D & immunity