Do You Need a Multivitamin? A Practical UK Guide

Multivitamins are the most common supplement in British kitchen cupboards, yet they are also one of the most misunderstood. Some people take one "just in case" without knowing what is inside; others dismiss them entirely as expensive urine. The truth sits somewhere in between. This guide explains what a multivitamin can and cannot do, who is most likely to benefit, and how to read a label so you know exactly what you are getting.

What a multivitamin actually is

A multivitamin is a food supplement that combines several vitamins (and sometimes minerals) in one daily dose. There is no legal definition of how many nutrients it must contain, so two products sold as "multivitamins" can look completely different on the back of the pack. One might contain thirteen vitamins and no minerals; another might add iron, zinc, iodine and selenium.

That variety is why the first rule is simple: always read the nutrition table, not the front of the box. The table lists each nutrient, the amount per daily dose and the percentage of the Nutrient Reference Value (%NRV), which is the EU-derived reference amount still used on UK labels.

Do you need one? Start with your diet

The NHS position is clear: most people should be able to get the vitamins and minerals they need from a varied, balanced diet, although some people may need extra supplements. A multivitamin is not a replacement for vegetables, wholegrains, pulses, dairy or fortified alternatives, oily fish and good-quality protein. It is a back-up for gaps, not a foundation.

A useful way to decide is to look honestly at a typical week of eating. Ask yourself:

• Do I regularly eat at least five portions of fruit and vegetables a day?
• Do I eat a range of colours, or the same three vegetables on rotation?
• Am I cutting out whole food groups (dairy, meat, fish, grains)?
• Am I eating noticeably less than usual because I am dieting, busy or travelling?
• Has my training volume gone up, so my food choices need to work harder?

If several answers point to gaps, a multivitamin can be a sensible, low-effort way to cover the basics while you work on your diet.

Who is most likely to benefit

People in a calorie deficit

Eating less food generally means eating fewer micronutrients. If you are trimming calories for an event or simply eating smaller portions, a broad-spectrum multivitamin can help keep your intake of key vitamins steadier.

Plant-based eaters

Vegans and many vegetarians need a reliable source of vitamin B12, which is found naturally almost only in animal foods. Vitamin D, iodine and (for some) omega-3 also deserve attention. A multivitamin that includes B12 can help, though some people prefer a dedicated B12 supplement.

Everyone in the UK in autumn and winter

Government advice is that everyone should consider a daily supplement containing 10 micrograms of vitamin D during autumn and winter, because UK sunlight between October and early March is not strong enough for the skin to make enough. Many multivitamins already include vitamin D, so check the label before adding a separate product.

Busy, active adults

Long working days, early training sessions and food eaten on the go can quietly narrow your diet. For people in this situation, a daily multivitamin is a practical habit rather than a magic fix.

What the authorised claims say

In Great Britain, supplements can only make health claims that appear on the GB Nutrition and Health Claims Register, and only when the nutrient is present at a meaningful level (usually at least 15% of the NRV per daily dose). For a broad multivitamin, the relevant claims include:

• Vitamin C, riboflavin, niacin, pantothenic acid, vitamin B6, folate and vitamin B12 contribute to the reduction of tiredness and fatigue.
• Vitamins A, C, D, B6, B12 and folate contribute to the normal function of the immune system.
• Thiamin, riboflavin, niacin, pantothenic acid, vitamin B6, biotin, vitamin B12 and vitamin C contribute to normal energy-yielding metabolism.
• Vitamin D contributes to the maintenance of normal bones and normal muscle function.

Notice what is not on that list: there are no authorised claims that a multivitamin "boosts" energy, prevents colds or slows ageing. Be wary of any product that implies otherwise.

How to read a multivitamin label

Here is a quick checklist to use in the shop or online:

1. Daily dose. Is it one tablet or two? Prices per pack can be misleading if the dose is two tablets.
2. %NRV. Values around 100% cover the reference amount. Higher figures are not automatically better.
3. Vitamin A. The NHS advises not taking more than 1.5mg (1,500 micrograms) a day from food and supplements combined, and pregnant women should avoid vitamin A supplements altogether.
4. Vitamin B6. The NHS advises not exceeding 10mg a day from supplements unless a doctor advises otherwise.
5. Minerals. Does it include iron, zinc or iodine? If not, and you need them, you may have to look at your diet or a separate product.
6. Format. Tablets usually fit more nutrients per dose; gummies are easier to take but often contain a narrower range.

Choosing the right format

If you want the broadest coverage, a tablet multivitamin is usually the better choice. Our Multivitamin provides vitamins A, C, D3, E and K1 plus the full B group in two tablets a day, including 25 micrograms of vitamin D3, 33 micrograms of vitamin B12 and 400 micrograms of folic acid. Because it contains 1,200 micrograms of vitamin A, it is not suitable during pregnancy, and you should avoid combining it with other vitamin A supplements or fish liver oils.

If tablets are the reason you keep forgetting, the Multivitamin Gummies are a vegan, strawberry-flavoured alternative with 13 active ingredients, including B vitamins, vitamin C, vitamin D3 and zinc. A narrower formula you actually take every day beats a comprehensive one sitting at the back of the cupboard.

How to take a multivitamin

• With food. Fat-soluble vitamins (A, D, E and K) are absorbed better alongside a meal containing some fat.
• At a consistent time. Pair it with breakfast or your post-training meal so it becomes automatic.
• Do not double up. If you also take a separate vitamin D, B complex or "immune" product, add up the totals to avoid unnecessary high intakes.
• Check medication. If you take prescribed medicines, are pregnant or have a medical condition, speak to your GP or pharmacist first.

Common myths

"More is better"

Once your needs are met, extra amounts of most vitamins do not give extra benefit, and some (vitamin A, B6) can be harmful at high intakes over time.

"A multivitamin cancels out a poor diet"

Whole foods provide fibre, protein, healthy fats and thousands of plant compounds that no tablet can replicate. Think of a multivitamin as insurance, not a substitute.

"You will feel it straight away"

Multivitamins are not stimulants. Any difference, if you were genuinely short of something, tends to be gradual.

Products mentioned in this article

Frequently asked questions

Is it safe to take a multivitamin every day?

For most healthy adults, taking a multivitamin at the recommended dose every day is fine. Problems usually arise when people stack several products and exceed safe intakes of nutrients such as vitamin A or B6.

What time of day should I take a multivitamin?

Any time that suits you, ideally with a meal. Many people find breakfast easiest to remember.

Can I take a multivitamin and vitamin D together?

Yes, but check the vitamin D content of your multivitamin first. The NHS advises adults not to take more than 100 micrograms of vitamin D a day.

Are gummies as good as tablets?

Gummies are convenient and pleasant to take, but they often contain fewer nutrients. Compare the labels and choose the format you will use consistently.

Should women take a different multivitamin?

Women who are pregnant or trying to conceive need 400 micrograms of folic acid daily and should avoid vitamin A supplements, so a pregnancy-specific product is usually more appropriate. Speak to your midwife, GP or pharmacist.

Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.