Vitamins and minerals are needed in tiny amounts, yet they support almost every everyday function, from releasing energy and making red blood cells to maintaining bones, immunity and normal nerve function. The difficulty is that UK guidance is spread across several pages and the numbers vary by nutrient, age and sex. This plain-English guide to essential vitamins and minerals daily intake UK recommendations brings the main adult figures together and shows how ordinary foods can help you meet them.
Understanding UK daily intake figures
People often search for “RDA UK”, but the official UK term is Reference Nutrient Intake, or RNI. An RNI is set high enough to meet the needs of nearly all healthy people in a particular group; it is not a personalised prescription or a target that must be hit perfectly every day. Needs can change with age, pregnancy, breastfeeding, medical conditions and certain medicines. The figures below mainly apply to healthy adults aged 19 to 64.
Essential vitamin intake for UK adults
Vitamins A, C, E and K
Vitamin A supports vision, immunity and healthy skin. The adult RNI is 700 micrograms a day for men and 600 micrograms for women. Useful sources include eggs, dairy foods and oily fish, while carrots, sweet potatoes and leafy greens provide beta-carotene, which the body converts into vitamin A. Liver is extremely rich in vitamin A and should be avoided during pregnancy.
Adults need 40mg of vitamin C daily. Peppers, berries, citrus fruit, broccoli, Brussels sprouts and potatoes all contribute. Vitamin E needs are 4mg for men and 3mg for women, with vegetable oils, nuts, seeds and wheatgerm among the best sources. Vitamin K needs are estimated at about 1 microgram per kilogram of body weight each day and are usually covered by leafy greens, broccoli, vegetable oils and cereal grains.
B vitamins for energy, blood and nerves
B vitamins help the body release energy from food and support the nervous system and blood formation. Daily adult figures include thiamin at 1mg for men and 0.8mg for women; riboflavin at 1.3mg and 1.1mg; niacin equivalent at 16.5mg and 13.2mg; and vitamin B6 at 1.4mg and 1.2mg. Both men and women need 1.5 micrograms of vitamin B12 and 200 micrograms of folate. Wholegrains, fortified cereals, dairy foods, eggs, meat, fish, pulses and green vegetables provide a broad mix. Vegans need a reliable fortified food or supplement source of B12.
Vitamin D intake deserves special attention
Adults need 10 micrograms of vitamin D a day. It helps regulate calcium and phosphate, supporting bones, teeth and muscles. Oily fish, egg yolks and some fortified foods contain it, but diet alone may not provide enough. UK guidance says everyone should consider a 10-microgram daily supplement during autumn and winter. People with little sun exposure, those who cover most of their skin outdoors, and people with dark skin, including many of African, African-Caribbean or South Asian background, should consider it throughout the year.
Key mineral intake for UK adults
Calcium, magnesium and potassium
Calcium is essential for bones and teeth as well as normal muscle and nerve function. Adults need 700mg daily, available from milk, yoghurt, cheese, calcium-set tofu, fortified plant drinks and some green vegetables. Magnesium requirements are 300mg for men and 270mg for women; nuts, wholemeal bread, seeds, pulses and spinach are helpful sources. Potassium supports fluid balance and normal heart muscle function, with an adult target of 3,500mg. Potatoes, beans, vegetables, fruit, nuts, fish and poultry all contribute.
Iron, zinc, iodine and selenium
Iron helps make haemoglobin, which carries oxygen in the blood. Men aged 19 and over need 8.7mg daily. Women aged 19 to 49 need 14.8mg, falling to 8.7mg from age 50, although those still having periods may require more. Beans, chickpeas, fortified cereals, nuts, dried fruit and meat provide iron; pairing plant sources with vitamin C can improve absorption.
Zinc supports wound healing and normal cell processes. Men need 9.5mg and women 7mg daily, from foods such as meat, shellfish, dairy, bread and cereals. Adults need 140 micrograms of iodine for thyroid function; fish, eggs, dairy foods and iodine-fortified alternatives are practical sources. Selenium needs are 75 micrograms for men and 60 micrograms for women, with fish, meat, eggs and Brazil nuts among the richer options.
A food-first micronutrients guide
Rather than chasing each number separately, build variety into the week. Include fruit and vegetables of different colours, wholegrains, beans or lentils, nuts or seeds, and suitable dairy or fortified alternatives. Add fish, eggs or lean meat if you eat them. Fortified cereals and plant drinks can be useful, but check labels because nutrient levels vary. This pattern is more dependable than expecting one “superfood” to cover everything.
Deficiency and supplement safety
Tiredness, weakness, mouth changes or frequent illness can have many causes, so symptoms alone cannot confirm a mineral deficiency or vitamin shortage. Speak to a GP or registered dietitian if symptoms persist, your diet is very restricted, or you have a condition affecting absorption. More is not automatically better: high-dose supplements can cause harm or interfere with medicines. Follow NHS advice, product directions and any personalised medical guidance.
Frequently asked questions
Do I need a multivitamin every day?
Most healthy adults can obtain most micronutrients from a varied diet. Vitamin D is the main routine exception in UK guidance, particularly during autumn and winter. Other supplements may be appropriate for diagnosed deficiencies, restricted diets or specific life stages.
Should daily intake be met exactly every day?
No. RNIs are reference figures, and intake naturally varies. What matters for most nutrients is a consistently balanced pattern over time, although water-soluble vitamins such as vitamin C and several B vitamins should feature regularly.
Are nutrition-label NRVs the same as UK RNIs?
Not exactly. Nutrient Reference Values on food labels are standardised figures used to describe a product. UK RNIs are population-group recommendations and may differ by sex, age or life stage.
Do pregnancy requirements change?
Yes. Anyone who is pregnant, trying for a baby or could become pregnant is advised to take 400 micrograms of folic acid daily before conception and through the first 12 weeks. Some people need a prescribed 5mg dose. Pregnancy also changes safety advice, including avoiding liver and vitamin A supplements containing retinol, so seek professional guidance.
Building a balanced daily routine
The most useful approach is not perfect tracking but regular variety. Use UK RNI figures as a practical benchmark, pay particular attention to vitamin D intake and nutrients your diet may exclude, and seek qualified advice before treating a suspected deficiency. Small, consistent food choices usually do more for micronutrient coverage than an overloaded supplement shelf.