How to Choose a Multivitamin
Faced with "men's", "women's", "50+" and gummy multivitamins side by side, it is hard to tell what really separates them. This guide shows you how to compare formulas line by line, which nutrients have upper limits, and when a multivitamin needs a pharmacist's check.
What a multivitamin is
A multivitamin, or multivitamin and mineral supplement, combines several vitamins and often minerals in one daily product. There is no legal definition of what a multivitamin must contain, so formulas range from a handful of nutrients to more than 25, at amounts from a small fraction of the reference values to several times them. Some also add botanicals, omega-3s or other ingredients.
No health claim is authorised in the EU for multivitamins as a product type. Authorised claims exist only for individual vitamins and minerals, and only when each is present in a meaningful amount, so you will find them on our individual nutrient pages rather than here. Large studies of multivitamins in generally well-nourished adults have mostly found little or no effect on long-term health outcomes, and the evidence is mixed. People whose diets are limited, such as those eating very little or following strict vegan diets, are the groups most often discussed.
Types you'll see on the shelf
| Type | What to know |
|---|---|
| Once-a-day tablets | Usually the widest range of vitamins and minerals, including iron, zinc and iodine. |
| Gummies | Easy to take but often contain fewer minerals (iron and calcium are bulky) and include sugar or sweeteners. |
| Men's and women's formulas | Women's products often contain iron and folic acid; men's often contain little or no iron. |
| 50+ formulas | Often lower in iron and higher in vitamin B12 and vitamin D. |
| Pregnancy formulas | Usually contain 400 µg folic acid and avoid preformed vitamin A (retinol). |
| Children's formulas | Lower amounts suited to age groups; always follow the age on the pack. |
| Specialist formulas | For example, products designed for people after bariatric surgery, which can contain high levels of iron and should be used on medical advice. |
Examples from our shelves for some of the forms in the table above.
How much: NRVs and upper limits
There is no single reference amount for a multivitamin. Each nutrient has its own NRV, and the label shows a %NRV for each one. Many general formulas sit around 100% NRV for most nutrients, with higher amounts for vitamins like D and B12 that commonly exceed the reference.
The nutrients most worth checking against EFSA upper limits for adults are:
- Vitamin A (retinol): 3,000 µg RE a day.
- Vitamin D: 100 µg (4,000 IU) a day.
- Vitamin B6: 12 mg a day.
- Folic acid: 1,000 µg a day.
- Zinc: 25 mg a day. Iodine: 600 µg a day. Selenium: 255 µg a day.
- Iron: EFSA gives a safe level of intake of 40 mg a day for adults.
These limits include food and every supplement you take, so stacking a multivitamin with a hair formula, a B complex and a vitamin D product can add up quickly. A varied diet of fruit, vegetables, whole grains, protein foods and dairy or fortified alternatives remains the foundation. Compare formulas in our vitamins and minerals collection.
Who should check with a doctor or pharmacist first
- Pregnancy and planning pregnancy: choose a pregnancy formula; UK guidance is to avoid supplements containing retinol during pregnancy.
- Smokers and former smokers: avoid formulas with large amounts of beta-carotene and vitamin A.
- People taking warfarin: many multivitamins contain vitamin K, which affects how warfarin works.
- People taking thyroid medicine or certain antibiotics: iron, calcium, magnesium and zinc can interfere with levothyroxine and with tetracycline or quinolone antibiotics, so timing matters.
- Anyone with a condition affecting iron levels, or the kidneys or liver.
- Children: keep all iron-containing products locked away, as accidental iron overdose is dangerous for young children. Use only children's formulas, check the age on the pack and ask a doctor or pharmacist.
How to read a multivitamin label
- Check the serving size. "Per serving" may mean two gummies or two tablets.
- Scan the %NRV column for any nutrient far above 100%, then compare it with the upper limits above.
- Look for iron. Decide whether you want an iron-containing or iron-free formula and ask your doctor if unsure.
- Check vitamin A's form: retinol or retinyl esters count towards the upper limit; beta-carotene does not.
- Add up overlapping products before buying anything else, and count servings per pack to know how long it lasts.
Bahrain and GCC notes
Store multivitamins below 25°C, away from bathroom humidity and never in a parked car; gummies in particular soften in the heat. During Ramadan, take your multivitamin with suhoor or iftar, as a meal helps with fat-soluble vitamins and may be easier on the stomach for formulas containing iron or zinc. Explore options in our vitamins and minerals collection.
Reading a real label
Centrum Women, 100 Tablets| On the label | What it means |
|---|---|
| 23 micronutrients | Vitamins and minerals in one daily tablet |
| 10 mg iron | 71% NRV, against the 14 mg reference intake |
| 300 µg folic acid | 150% NRV, against the 200 µg reference intake |
| 10 µg vitamin D | 200% NRV, against the 5 µg reference intake |
| 100 tablets, 1 a day | A 100-day supply |
No health claim is authorised for this ingredient in the EU. We share facts only.
Products with Multivitamins
Always read the label and check the amount per serving.
AMERIXAMERIX Multivitamin, 60 GummiesBHD7.130
DéléBooDéléBoo Multivitamin Beans with Zinc and Iodine (Green Apple), 90 GummiesBHD9.680
Sundance VitaminsSundance Adult Multivitamin Gummies with Collagen, 50 GummiesBHD8.710
CENTRUMCentrum Women, 100 TabletsBHD14.680
CENTRUMCentrum Men, 30 TabletsBHD5.330Frequently asked questions
Do I need a multivitamin if I eat well?
Most people can get the nutrients they need from a varied, balanced diet. A doctor or dietitian can help you decide whether a multivitamin suits your circumstances.
Is there an EU health claim for multivitamins?
No. No health claim is authorised in the EU for multivitamins as a product type; claims apply only to individual vitamins and minerals at meaningful amounts.
Should I choose a multivitamin with or without iron?
It depends on your needs. Iron-free formulas are common for men and older adults, while women's formulas often include iron. Ask your doctor if you are unsure.
Can I take a multivitamin with other supplements?
Often yes, but add up nutrients such as vitamin A, vitamin D, B6, folic acid, zinc and iron across all products and compare the totals with the upper limits.
When is the most practical time to take a multivitamin?
Many people take it with a meal, which suits fat-soluble vitamins and can be gentler on the stomach. During Ramadan, suhoor or iftar both work.
