Immune support supplements
Nothing 'boosts' the immune system.
Short answer Nothing 'boosts' the immune system. Vitamins A, C, D, B6, B12, folate, zinc, selenium, iron and copper each contribute to its normal function, which matters if you are short of them. For most people, vitamin D in winter is the one supplement advised.
Nutrients with authorised claims
| Nutrient | Good sources |
|---|---|
| Vitamin D | Sunlight; oily fish; supplements in winter |
| Vitamin C | Fruit and vegetables |
| Zinc | Meat, shellfish, dairy, bread |
| Selenium | Brazil nuts, fish, eggs |
| Iron | Meat, beans, nuts, fortified cereals |
What does not
Echinacea, elderberry and 'immune shots' have inconsistent evidence. High-dose vitamin C does not prevent colds.
What does
Vaccination, sleep, not smoking, activity and a varied diet.
One option
A standard multivitamin and mineral covers the nutrients above at everyday levels.
Related pages
- Vitamin DUK guidance is that everyone should consider a daily supplement of 10 micrograms (400 IU) of vitamin D during autumn and winter.
- Vitamin CAdults need 40mg of vitamin C a day, which a normal diet with fruit and vegetables provides.
- ProbioticsProbiotics are live bacteria and yeasts sold as supplements, yoghurts and drinks.
Keep exploring
- Electrolyte powders
- Popular supplement ingredients
- Magnesium
- Wellosophy Astaxanthin & Bilberry Extract
- Collagen tablets and capsules
- Folic acid
Questions people ask
How can I boost my immune system?
You cannot boost it; you can avoid deficiencies and look after your general health.
Does zinc help immunity?
Zinc contributes to the normal function of the immune system.
Can I take this with medication?
Ask a pharmacist or GP first; some supplements interact with medicines.
Do supplements replace a balanced diet?
No. They are meant to add to a varied diet, not stand in for one.
Sources
- NHS: Vitamins and minerals (opens in a new tab)
- NHS: Vitamin D (opens in a new tab)
- NHS: Vitamin C (opens in a new tab)
- Great Britain nutrition and health claims register (opens in a new tab)
Checked 9 October 2026.