Immune Support
Immune support supplements in one place: vitamin D3, vitamin C, zinc, selenium and elderberry, in capsules, drops, lozenges and powders. We explain which nutrients carry approved immune claims and how to use them daily.Read more →
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What immune system vitamins and minerals actually do
Immune support is not one product. It is a small group of nutrients your body needs in steady amounts, plus a few plant extracts with a long history of use. European food law allows immune claims for a short list only: vitamin C, vitamin D, zinc, selenium, copper, iron, folate, vitamin A, vitamin B6 and vitamin B12. Elderberry, echinacea and mushroom extracts sit outside that list. We keep the difference visible, because it changes what you can reasonably expect from a bottle.
Vitamin D carries the most weight in a British winter
From October to March, the sun in the UK is too weak for your skin to make vitamin D. Guidance here is that everyone considers 10 micrograms, or 400 IU, a day in autumn and winter, and all year if you are rarely outdoors or have darker skin. Most products in this collection give 1000 IU or 2000 IU, which stays well below the 4000 IU daily limit for adults. We stock vitamin D3 in drops, softgels and sprays, because D3 raises blood levels more reliably than D2.
Dose and form decide what your body absorbs
The UK reference intake for vitamin C is 40 mg a day, yet most supplements hold 500 mg to 1000 mg. More is not automatically better: above roughly 200 mg per dose your body takes up a smaller share, so spreading the amount over the day beats one large tablet. If plain ascorbic acid upsets your stomach, buffered forms such as calcium or magnesium ascorbate are gentler. Our vitamin C range covers both, plus liposomal liquids, where the vitamin sits in a tiny fat layer so the body absorbs it better.
With zinc, the salt on the label matters. Zinc citrate, bisglycinate and picolinate dissolve more easily than zinc oxide, so those are the forms we favour in our zinc selection. Lozenges are a separate case: they release zinc slowly in the mouth and throat, which is why many people keep a tube for the first day of a cold. Selenium is the quiet one. UK soils are low in it, adults need 60 to 75 micrograms a day, and one modest supplement usually covers the gap.
How we choose what goes into this collection
We start with three questions: is the form well absorbed, is the dose meaningful, and does the combination make sense. That means D3 instead of D2, zinc in a well absorbed salt instead of oxide, and vitamin D paired with K2 instead of a long list of extras that only look impressive on a label. We are brand-neutral: we carry what delivers, not what pays us most. Every product passes our compliance team before it goes live, we test products ourselves, and independent labs spot-check batches. If you want the full method, read how we select brands and products.
This collection suits you if winter tends to catch you out, if you eat little oily fish or shellfish, or if you simply want one dependable daily base. Be realistic about timing: filling a nutrient gap takes two to three weeks of consistent use, and the pay-off is a steadier daily supply rather than an instant change. If you prefer to browse by situation, the wider immune system pages group products by need, from winter routines to everyday upkeep.
Frequently asked questions
What counts as an immune support supplement?
In practice it is any food supplement built around nutrients that contribute to the normal function of the immune system, most often vitamin C, vitamin D, zinc and selenium. Some products add plant extracts such as elderberry or echinacea, or live bacteria. Those extras are sold on tradition and research rather than an approved claim. A supplement fills a nutritional gap, so it works alongside food, sleep and daylight, not instead of them.
Which nutrients are allowed to make an immune claim?
Under European food law, only a defined list may state that it contributes to the normal function of the immune system: vitamin C, vitamin D, vitamin A, vitamin B6, vitamin B12, folate, zinc, selenium, copper and iron. Nothing on that list is described as preventing or treating illness, because no food supplement may claim that. We flag which nutrient in a formula carries the claim, so you can see what you are actually paying for.
How much of each nutrient do adults need each day?
These are the UK reference amounts for adults aged 19 to 64. They describe what a normal diet plus supplements should supply in total, not a therapeutic dose. Most people in the UK meet the vitamin C, zinc and selenium figures through food, while vitamin D is the one that regularly needs a supplement in autumn and winter.
| Nutrient | Men | Women |
|---|---|---|
| Vitamin C | 40 mg | 40 mg |
| Vitamin D | 10 mcg (400 IU) | 10 mcg (400 IU) |
| Zinc | 9.5 mg | 7 mg |
| Selenium | 75 mcg | 60 mcg |
Source: NHS
Which form should I choose?
Form decides absorption, comfort and how easy the product is to keep taking. This is how the main options in this collection compare.
| Form | What it is | Suits |
|---|---|---|
| Vitamin D3 drops | Oil-based liquid | Flexible dosing, children |
| Vitamin D3 softgel | Fixed daily dose | Simple routines |
| Buffered vitamin C | Mineral ascorbate | Sensitive stomachs |
| Liposomal vitamin C | Fat-wrapped liquid | Lower doses, better uptake |
| Zinc citrate or bisglycinate | Well absorbed salt | Daily use |
| Zinc lozenge | Slow release in mouth | Short-term use |
When should I take them, and how quickly do they work?
Vitamin D and vitamin A are fat-soluble, so take them with a meal that contains some fat. Zinc absorbs best away from food, but if it makes you feel queasy, take it with a light meal instead. Vitamin C is water-soluble and fine at any time. Expect a gradual effect: refilling low vitamin D stores takes weeks, and most people notice the value of consistency rather than a single dose.
Can I combine several immune supplements without overdoing it?
Add up the labels first. A multivitamin, a vitamin D softgel and a zinc lozenge can easily double your intake without you noticing. Vitamin A is the one to watch, since intake from food and supplements combined should stay at or below 1.5 mg a day. If you already take a broad formula from our multivitamin range, one targeted extra is usually enough.
Are immune supplements suitable for children or during pregnancy?
Children have their own dosing, so use products made for their age group rather than half an adult tablet. UK guidance is that children aged 1 to 4 take 10 micrograms of vitamin D daily all year. During pregnancy, avoid supplements high in vitamin A and avoid liver, because too much vitamin A can be harmful to the baby. Vitamin D at 10 micrograms a day is advised in pregnancy and while breastfeeding.
How much zinc or vitamin D is too much?
High daily zinc over long periods competes with copper absorption, which is why we do not stock everyday zinc above the levels below. Very high vitamin D over time raises calcium in the blood. The figures here are upper limits for adults from all sources, not targets to aim for.
| Nutrient | Upper limit (adults) |
|---|---|
| Vitamin D | 100 mcg (4000 IU) |
| Vitamin A | 1.5 mg |
| Zinc | 25 mg |
| Selenium | 300 mcg |

























