Zinc
Zinc tablets, capsules and lozenges in forms such as bisglycinate, citrate, picolinate and gluconate. We explain how much elemental zinc a label really gives you, which form suits sensitive stomachs, and when to take it.Read more →
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Zinc forms, dosage and what to take it with
Zinc is a trace mineral, which means your body needs only small amounts of it. It cannot store zinc, so a steady daily intake matters. In the UK the reference intake is 9.5 mg a day for men and 7 mg for women, and most people reach that through meat, shellfish, cheese, eggs, beans and wholegrains. Zinc sits in our wider range of minerals for good reason: it contributes to the normal function of the immune system and to the maintenance of normal hair, skin and nails.
The figure on the front of the pack is not always the zinc you take
Zinc always comes bound to another molecule: citrate, gluconate, picolinate, bisglycinate or sulphate. That compound weighs more than the zinc inside it, so only the elemental zinc figure tells you your real dose. A clear label states it per tablet and per daily dose. Absorption also depends on your meal. Phytates, natural substances in the skins of beans, lentils and wholegrains, bind zinc in the gut and lower how much you take up. Soaking pulses and cooking them well reduces that effect, which matters most on a plant-based diet.
Forms differ more in comfort than in strength
Most people who react badly to zinc react to the form, not to the mineral. Zinc sulphate is the cheapest option and the one most often linked to a queasy stomach when taken without food. Citrate, gluconate, picolinate and bisglycinate are usually easier to tolerate.
- Tablets and capsules: the practical choice for daily intake, taken with a meal.
- Lozenges: dissolve slowly in the mouth and are used for short stretches.
- Drops and liquids: easier to dose for children or anyone who dislikes swallowing pills.
- ZMA-style blends: zinc with magnesium and vitamin B6, often taken in the evening.
How we choose the zinc in this collection
We judge three things: the form, the dose and the combination. For everyday use we prefer well tolerated forms such as bisglycinate, citrate and gluconate, at roughly 10 to 25 mg elemental zinc per daily dose, because UK guidance is to stay under 25 mg a day from supplements unless a doctor advises otherwise. Higher-strength products have their place for short, supervised use, and we say that plainly rather than calling them maximum strength. We also value formulas that add a small amount of copper, since zinc and copper compete for absorption. Every product passes our compliance team, and we test ourselves alongside independent lab checks. Read how we select brands and products.
Who a zinc supplement genuinely suits
Zinc is worth considering if you eat little meat or fish, follow a vegan or vegetarian diet, train hard and sweat a lot, or eat a narrow diet for other reasons. If your meals already include animal protein most days, you are probably close to the reference intake and a multivitamin may be enough. Be realistic about the timeline too. Zinc is not something you feel working from one dose. Hair and nails only change as new tissue grows, so give it two to three months of consistent use before you decide whether it earns its place. If your reason for taking zinc is seasonal, our immune support selection shows what else fits alongside it.
Frequently asked questions
What does zinc do in the body?
Zinc is an essential trace mineral involved in a large number of enzyme reactions. Under EU and UK rules, approved statements include that zinc contributes to the normal function of the immune system, to normal cognitive function, to normal DNA synthesis, to normal fertility and reproduction, and to the maintenance of normal hair, skin, nails, bones and vision. Your body keeps no real reserve, so a regular intake from food or a supplement is what keeps levels steady.
How much zinc do I need each day in the UK?
The UK reference intake depends on sex, and there is separate advice on how much to take from supplements. Most adults eating varied meals already meet the reference intake, so a supplement is about filling a gap rather than adding more on top.
| Group | Amount per day |
|---|---|
| Men 19 to 64 years | 9.5 mg |
| Women 19 to 64 years | 7 mg |
| Maximum from supplements | 25 mg |
Stay below 25 mg a day from supplements unless a doctor advises otherwise, because more does not add benefit.
Source: NHSWhich form of zinc should I choose?
For most people the practical question is tolerance, not a small difference in uptake. Start with a gentler form at a modest dose and take it with food.
| Form | Character | Suits |
|---|---|---|
| Bisglycinate | Bound to an amino acid, mild | Sensitive stomachs |
| Citrate | Well tolerated, neutral taste | Daily use |
| Picolinate | Popular, generally gentle | Daily use |
| Gluconate | Widely studied, low cost | Budget choice |
| Sulphate | Cheapest, harsher | With a full meal only |
Whichever you pick, compare the elemental zinc per dose, not the compound weight.
Should I take zinc with food or on an empty stomach?
Take it with or just after a meal. Zinc salts are absorbed slightly better without food, but that is also when they most often cause nausea or a burning feeling, especially at higher doses and with sulphate. A meal buffers the mineral and makes daily use realistic, which matters more than a small absorption edge you abandon after a week. If mornings feel rough, move it to lunch or dinner.
Can I take zinc together with iron, calcium or magnesium?
Zinc and iron compete for the same route into the body, so a large iron dose taken at the same moment reduces zinc uptake. Leave two to three hours between a zinc supplement and separate iron or calcium tablets. Magnesium is different: the two are routinely combined in ZMA-style products with vitamin B6 and that works fine. Pairing zinc with vitamin C in one dose causes no absorption problem.
Why do some zinc products also contain copper?
Zinc and copper use overlapping transport in the gut, so a high zinc intake kept up for months can lower copper levels. That is one of the reasons behind the 25 mg supplement ceiling. Products that add roughly 1 mg of copper to 15 or 25 mg of zinc are trying to keep that balance. At a normal daily dose the risk is small, but if you plan to take zinc for a long stretch, a formula with copper is the more sensible pick.
How long does it take before zinc makes a difference?
There is no sensation to wait for. If your intake was low, blood levels respond within weeks, but the visible things people care about follow the pace of new tissue. Nails grow slowly and hair even more slowly, so judge that after two to three months of consistent daily use, not after a fortnight. If you notice nothing and your diet already includes meat, fish or dairy most days, zinc was probably not the missing piece.
Is a zinc supplement suitable during pregnancy or while breastfeeding?
Zinc requirements are covered in most pregnancy multivitamins, which typically supply a modest amount alongside folic acid and vitamin D. Do not stack a separate high-strength zinc product on top of a prenatal formula, and keep total supplemental zinc below 25 mg a day. Discuss anything higher with your midwife, GP or pharmacist first. This is a case where more is not safer, because excess zinc affects copper status.
Do vegetarians and vegans need more zinc than the reference intake?
Their intake target is the same, but reaching it takes more care. Plant sources such as beans, lentils, nuts and wholegrains contain phytates, which bind zinc in the gut and reduce how much you absorb. Animal protein has the opposite effect. Practical steps help: soak pulses, cook them thoroughly, choose sourdough or fermented grain products, and include seeds and cashews. If your diet stays narrow, a supplement of 10 to 15 mg elemental zinc is a reasonable everyday level.
