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How Much Zinc a Day? UK Amounts for Men, Women and Children
Adults in the UK need about 9.5 mg of zinc a day for men and 7 mg for women, and the NHS says: "Do not take more than 25mg of zinc supplements a day unless advised to by a doctor."1 A supplement at its label dose, taken every day, sits inside that line; 50 mg a day sits outside it, and is the dose at which trials saw a copper marker fall. This is the dose spoke of the Wellgard zinc guide.
How much zinc do adults need a day in the UK?
The NHS: "The amount of zinc you need is about: 9.5mg a day for men (aged 19 to 64 years), 7mg a day for women", and "You should be able to get all the zinc you need from your daily diet."1 The government's dietary recommendations keep the same figures from 65 upwards.2 On a label, 100% of the nutrient reference value (NRV) is 10 mg.
The European Food Safety Authority sets its figures by phytate, the compound in wholegrains, pulses and seeds that binds zinc in the gut: its population reference intakes run from 7.5 to 12.7 mg a day for women and 9.4 to 16.3 mg for men as phytate rises from 300 to 1,200 mg a day.3 Zinc contributes to the normal function of the immune system and to the maintenance of normal skin, hair and nails; a reference intake keeps those functions normal in nearly everyone, and is not a dose that does more above it.
How much zinc for a woman, a man, in pregnancy, when breastfeeding, and for children?
The NHS gives adult figures only; the children's figures are the UK government's, whose tables start at age 1, and the pregnancy and breastfeeding additions are EFSA's.2, 3 What does zinc do for a woman and what does zinc do for men go further.
| Who | Zinc a day |
|---|---|
| Men, 19 and over | 9.5 mg |
| Women, 19 and over | 7 mg |
| Pregnancy | No separate UK figure; EFSA adds 1.6 mg to its figure for women |
| Breastfeeding | No separate UK figure; EFSA adds 2.9 mg to its figure for women |
| Children, 1 to 3 | 5 mg |
| Children, 4 to 6 | 6.5 mg |
| Children, 7 to 10 | 7 mg |
| Children, 11 to 14 | 9 mg |
| Teenagers, 15 to 18 | 9.5 mg boys, 7 mg girls |
The 25 mg line holds in pregnancy: the EU's Scientific Committee on Food wrote that "the UL of 25 mg zinc per day applies also to pregnant and lactating women"; ask a GP or midwife about anything above a pregnancy multivitamin's label.5 For children the NHS gives no supplement figure; the same committee set upper levels of 7 mg a day at 1 to 3 years, 10 mg at 4 to 6, 13 mg at 7 to 10, 18 mg at 11 to 14 and 22 mg at 15 to 17.5
Why does the NHS say not more than 25 mg of zinc from supplements?
The NHS gives the reason in one line: "Taking high doses of zinc reduces the amount of copper the body can absorb. This can lead to anaemia and weakening of the bones."1 The number comes from the UK Expert Group on Vitamins and Minerals, which in 2003 took 50 mg a day as the lowest dose with an observed effect, applied an uncertainty factor of two, and set a Safe Upper Level of "50/2 = 25 mg zinc/day for supplemental zinc for daily consumption over a lifetime".4 The EU's Scientific Committee on Food reached the same figure that year, "An UL of 25 mg/day is recommended", for food and supplements together.5 The trials behind the 50 mg figure are small and short: in men given two 25 mg doses a day for six weeks, a copper-dependent enzyme in red cells fell, significantly by week six, while plasma copper did not change; in women given 50 mg a day for ten weeks, the same enzyme, haematocrit and ferritin were lower at the end.6, 7 Other countries set higher limits; the UK figure is the one UK labels and the NHS work to.
Is it safe to take zinc every day?
Yes, within the 25 mg line, and daily is the normal pattern, because the body holds no dedicated zinc store. Absorption follows what you ate today, not your past intake, and the gut keeps the body in balance by adjusting how much zinc it loses back into the stool.8 The Expert Group's 25 mg is for "daily consumption over a lifetime".4 The "why shouldn't you take zinc every day" answers online rest on two higher-dose facts: the copper effect at 50 mg a day and above, and nausea, which is more likely on an empty stomach.4, 9 Take zinc with a meal (when is the best time to take zinc), and two hours away from iron or calcium supplements and from quinolone or tetracycline antibiotics (ciprofloxacin, doxycycline, lymecycline) or penicillamine; vitamin C and zinc together has the timing detail.
The signs of too much are dose-related. In 47 volunteers taking 150 mg a day, headaches, abdominal cramps, nausea, loss of appetite and vomiting were reported by 84% of the women and 18% of the men.9 Over months at high doses the picture is copper deficiency: anaemia, low white cells and, in a review of 55 cases, a spinal cord disorder that mimics B12 deficiency, with zinc overload, previous upper gut surgery and malabsorption as risk factors and only partial recovery.10 The way to lower a high intake is to stop the dose and see a GP. Can you take too much zinc? goes through the signs.
Is 50 mg of zinc a day too much?
Fifty milligrams a day is twice the NHS supplement line and the dose at which the copper enzyme fell in the trials above.6, 7 The NHS wording leaves that dose to a doctor. The same arithmetic answers the other numbers people search: 15 mg and 20 mg a day sit inside the line, 30 mg and 45 mg above it. No trial has defined a zinc-to-copper ratio, and the NHS says 10 mg or less of copper a day from food, water and supplements is unlikely to cause harm, so adding copper to "balance" zinc is a GP conversation.1 Zinc and copper sets out the relationship.
How do you read zinc on a label?
UK labels give elemental zinc in milligrams and as a percentage of the 10 mg NRV. Zinc in a tablet is bound to a salt that weighs far more than the zinc in it: in one trial, "50 mg of elemental zinc" was 220 mg of zinc sulphate.9 If a listing quotes only a salt weight, the zinc inside is a fraction of it (which type of zinc is best). Then add everything up. A multivitamin with 10 mg of zinc plus a separate 15 mg zinc product is 25 mg a day before food, the line itself; how to choose a multivitamin shows where zinc sits in a formula, and the vitamins and minerals guide explains the units.
How long does zinc take to work?
If your intake was low, the blood responds within weeks: in the 2025 meta-analysis of zinc biomarkers, plasma or serum zinc rose by a mean of 2.17 micromoles per litre in controlled studies where intake changed for at least two weeks, and in the six-week trial above plasma zinc had risen by week six.6, 11 If you were not short, you may notice nothing: zinc contributes to normal DNA synthesis and to the protection of cells from oxidative stress, and a reference intake keeps those normal.
Who should ask a GP or pharmacist before taking zinc?
Anyone pregnant or breastfeeding who wants more than their multivitamin supplies; any parent choosing a children's product; anyone on iron, calcium, a quinolone or tetracycline antibiotic or penicillamine (what should you not take with zinc); and anyone with previous stomach or bowel surgery, a malabsorption condition or heavy drinking.10 The Expert Group also named people with diabetes and with haemochromatosis as groups with "insufficient data" to set a safe level.4 Loss of taste or smell, a rash around the mouth or wounds that will not heal are reasons to see a GP rather than to raise a dose; signs of zinc deficiency covers them.
Frequently asked questions
Can I take zinc with my multivitamin?
Yes, if the two together stay under 25 mg a day; 15 mg and 20 mg products are common because they sit inside that line on their own, so read both labels for elemental zinc.1
Do you pee out excess zinc?
Mostly not. The gut regulates zinc by adjusting how much it loses into the stool, which is also where a high dose blocks copper absorption.1, 8
How do you get 100% of your zinc a day from food?
By UK composition data, 100 g of braised beef supplies about 9.5 mg, a man's whole amount; 30 g of pumpkin seeds about 2 mg; 30 g of Cheddar about 1.2 mg; two eggs about 1.3 mg; two slices of wholemeal bread about 1.3 mg (foods high in zinc).12
Sources
- NHS. Vitamins and minerals: others, including zinc and copper. nhs.uk.
- Public Health England. Government Dietary Recommendations for males and females aged 1 to 18 years and 19+ years, 2016. gov.uk.
- EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on Dietary Reference Values for zinc. EFSA Journal, 2014. PubMed 42087959.
- Expert Group on Vitamins and Minerals. Safe Upper Levels for Vitamins and Minerals: zinc, 2003. UK Government Web Archive.
- Scientific Committee on Food. Opinion on the tolerable upper intake level of zinc, 2003, in Tolerable Upper Intake Levels for Vitamins and Minerals. efsa.europa.eu.
- Fischer PW, Giroux A, L'Abbé MR. Effect of zinc supplementation on copper status in adult man. American Journal of Clinical Nutrition, 1984. PubMed 6486080.
- Yadrick MK, Kenney MA, Winterfeldt EA. Iron, copper, and zinc status: response to supplementation with zinc or zinc and iron in adult females. American Journal of Clinical Nutrition, 1989. PubMed 2912000.
- King JC. Does zinc absorption reflect zinc status? International Journal for Vitamin and Nutrition Research, 2010. PubMed 21462113.
- Samman S, Roberts DC. The effect of zinc supplements on plasma zinc and copper levels and the reported symptoms in healthy volunteers. Medical Journal of Australia, 1987. PubMed 3547053.
- Jaiser SR, Winston GP. Copper deficiency myelopathy. Journal of Neurology, 2010. PubMed 20232210.
- Ceballos-Rasgado M, et al. Methods of assessment of zinc status in humans: an updated review and meta-analysis. Nutrition Reviews, 2025. PubMed 38917458.
- Public Health England. McCance and Widdowson's Composition of Foods Integrated Dataset (CoFID), 2021. gov.uk.
This article is general information, not medical advice; ask a GP or pharmacist before giving zinc to a child or taking it alongside medicines.
