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Support your immunity this winter
Short, dark days mean less vitamin D. A daily supplement and a few simple habits help you stay well through the colder months.
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In short
A daily vitamin D supplement is widely advised through winter when sunlight is scarce. Sleep, hydration, a varied diet and hand hygiene do the rest.
Why vitamin D in winter?
From autumn to spring, sunlight in northern latitudes is too weak for skin to make much vitamin D. Public-health guidance suggests a daily 10 microgram (400 IU) supplement for most adults through these months.
Vitamin D supports normal immune function and bone health. It is not a magic shield, but topping up a common winter shortfall is sensible and safe at recommended doses.
Frequently asked
How much vitamin D should I take?
For most adults, 10 micrograms (400 IU) daily through autumn and winter is widely recommended. Do not exceed the amount on the label unless advised by a clinician.
Does vitamin C prevent colds?
For most people, vitamin C does not prevent colds. It is safe in normal amounts, but sleep, hydration and hand hygiene protect you more.