Vitamins and minerals are needed in tiny amounts, but the advice around them can feel complicated. Food labels use one set of reference figures, NHS pages may use another, and individual needs change with age, sex, pregnancy, health conditions and medicines. Treat the figures below as population targets for healthy adults, not as a diagnosis or personalised prescription.
In UK guidance, RNI, or Reference Nutrient Intake, is often more accurate than “RDA UK”. An RNI is designed to meet the needs of nearly all people in a group. The Nutrient Reference Value shown on packaging is mainly a labelling tool, so it may not match the NHS figure for your age or sex.
Key daily vitamin intakes for UK adults
Vitamin A
Men aged 19 to 64 need about 700 micrograms a day and women need about 600 micrograms. Vitamin A supports normal vision, skin and immunity. Sources include eggs, dairy foods and oily fish, while carrots, sweet potatoes, spinach and red peppers provide beta-carotene, which the body can convert into vitamin A. High-dose retinol supplements are not suitable for everyone, and liver should be avoided during pregnancy because it is very rich in vitamin A.
B vitamins
B vitamins help release energy from food and support the nervous system and red blood cell production. Daily figures include thiamin at 1mg for men and 0.8mg for women, riboflavin at 1.3mg for men and 1.1mg for women, niacin at 16.5mg for men and 13.2mg for women, and vitamin B6 at 1.4mg for men and 1.2mg for women. Adults also need 200 micrograms of folate and about 1.5 micrograms of vitamin B12.
Wholegrains, meat, fish, eggs, dairy foods, pulses and leafy vegetables cover much of this group. Vitamin B12 deserves special attention in vegan diets because it is not naturally present in fruit, vegetables or grains. Fortified foods or a suitable supplement may be necessary.
Vitamins C, D, E and K
Adults need 40mg of vitamin C daily. Peppers, citrus fruit, berries, broccoli and potatoes are practical sources. Vitamin E needs are about 4mg for men and 3mg for women, usually supplied by plant oils, nuts and seeds. Vitamin K is based on body weight at roughly 1 microgram per kilogram each day; green leafy vegetables are a major source.
Vitamin D intake is the main seasonal exception. Adults need 10 micrograms, or 400 IU, a day. Because UK sunlight is not strong enough for reliable production during autumn and winter, everyone should consider a 10-microgram supplement during those months. People who are rarely outdoors, cover most of their skin, live in a care home or have dark skin may need to consider taking it throughout the year. Oily fish, egg yolks and fortified foods contribute, but diet alone often falls short.
Key daily mineral intakes for UK adults
Calcium, magnesium and potassium
Adults need 700mg of calcium a day for bones, teeth, muscles and nerves. Milk, yoghurt, cheese, calcium-set tofu, fortified plant drinks and fish eaten with the bones can help. Magnesium targets are 300mg for men and 270mg for women, with nuts, seeds, wholemeal bread and leafy greens among the best everyday choices.
Potassium supports fluid balance and normal heart and muscle function. Adults aged 19 to 64 need about 3,500mg daily. Potatoes, beans, vegetables, fruit, fish and meat all contribute. Potassium supplements need care, particularly for older adults or anyone with kidney disease or medicines that affect potassium levels.
Iron
Iron needs differ sharply. Men aged 19 and over need 8.7mg a day. Women aged 19 to 49 need 14.8mg, while women aged 50 and over usually need 8.7mg; those who still have periods may need the higher amount. Meat provides readily absorbed iron, while beans, chickpeas, nuts, dried fruit and fortified cereals provide non-haem iron. Pairing plant sources with vitamin C-rich food can improve absorption.
A practical example is a chickpea salad with red pepper, tomatoes and fruit. The pulses provide iron, while vitamin C helps the body absorb more of it. Persistent tiredness, breathlessness or paleness can have many causes, so suspected mineral deficiency should be assessed rather than treated blindly with high-dose tablets.
Iodine, zinc and selenium
Adults need 140 micrograms of iodine daily to make thyroid hormones. Dairy foods, eggs, sea fish and some iodine-fortified plant drinks are common sources. People following a strict vegan diet should check labels carefully because not every plant drink contains iodine.
Zinc requirements are about 9.5mg for men and 7mg for women. Meat, shellfish, dairy foods, bread and cereal products contribute. Selenium targets are 75 micrograms for men and 60 micrograms for women, with fish, meat, eggs and nuts supplying it. Excess selenium can affect hair and nails, while too much zinc can interfere with copper absorption.
How to cover your needs without tracking every milligram
Most people do not need to calculate every nutrient daily. Look at the pattern across a week. Include vegetables and fruit in varied colours, a regular source of protein, wholegrain or fortified starchy foods, and dairy or suitable fortified alternatives. Add nuts, seeds, beans and oily fish where appropriate. One meal can provide several micronutrients at once.
Useful related reading includes a balanced diet guide, an iron-rich foods guide and a dedicated vitamin D intake guide. These are natural internal linking opportunities because they expand the areas where food choice, season and life stage matter most.
When supplements need extra care
A supplement is not automatically harmless. High doses can cause side effects, interact with medicines or mask another deficiency. Pregnancy is a clear example: the NHS recommends 400 micrograms of folic acid daily from before conception, ideally three months before, until 12 weeks of pregnancy, while some people need a higher prescribed dose. Anyone who is pregnant, vegan, over 65, living with digestive or kidney disease, taking long-term medicines or experiencing unexplained symptoms should seek advice from a GP, pharmacist or registered dietitian.
Frequently asked questions
Do UK daily intake figures apply to everyone?
No. They are reference values for population groups. Children, pregnant people, older adults and people with certain medical conditions may have different needs.
Is a multivitamin necessary if I eat well?
Usually not. A varied diet can provide most nutrients. Vitamin D is the main routine exception in UK guidance, especially during autumn and winter.
Can I diagnose a deficiency from symptoms?
Not reliably. Tiredness, weakness, hair changes and poor concentration are nonspecific. A clinician may need to review your diet, medicines and blood tests.
Should I use the percentage on food labels?
It is useful for comparing products, but it is not a personalised target. Label reference values can differ from UK age- and sex-specific RNIs.
A sensible daily approach
The most effective way to meet essential vitamins and minerals daily intake in the UK is not a cupboard full of pills. It is a varied food pattern, sensible vitamin D use, attention to higher-risk life stages and professional advice when symptoms or restrictions make deficiency more likely. Use the figures as a practical map, then judge your diet over time rather than expecting every meal to be nutritionally perfect across ordinary everyday meals.