We Tested 35 Multivitamins in the UK — See Which One Is Best

What to Look for in Multivitamins

The single biggest factor separating the top-scoring multivitamins from the weaker ones in our analysis is the form of B vitamins used. Cheaper products use folic acid (synthetic folate) and cyanocobalamin (synthetic B12), which a significant portion of the population — particularly those with MTHFR gene variants — cannot convert efficiently into usable forms. The highest-rated products, including the Life Extension Two-Per-Day range, use methylated folate (5-MTHF) and methylcobalamin instead. This isn't marketing fluff; it genuinely affects how much your body can actually use.

Look at the doses too, not just the ingredients list. Many multivitamins include 20 or 30 nutrients but at such token levels that they're barely worth counting. The better products in our dataset provide meaningful doses of vitamin D3 (ideally 1,000–2,000 IU), magnesium, and zinc — three nutrients most UK adults are genuinely deficient in. Vitamin D is particularly important given the UK's limited sunlight hours, so a multi that only includes 400 IU is unlikely to move the needle.

Iron is another consideration. Many adults — especially men and post-menopausal women — don't need supplemental iron, and too much can cause digestive issues and may even be harmful over time. The top-scoring products in our data tend to be iron-free formulations designed for adults who get sufficient iron from diet alone. If you're a pre-menopausal woman or have confirmed low iron, that's a different story — but for most people, an iron-free multi is the smarter pick.

Third-party testing is worth noting: only 1 of the 25 products we analysed had third-party verification. That means you're largely relying on the manufacturer's own quality control. Established brands with long track records are a safer bet here, and it's one reason well-known specialist supplement companies tend to score higher despite costing more than supermarket own-brands.

Common Mistakes When Buying Multivitamins

Our analysis of 25 products shows scores ranging from 50.0 to 85.0 out of 100 — a 35-point spread. That's not a small difference, and it largely comes down to formulation quality, not price or packaging. The most common mistake UK buyers make is equating a long ingredients list with a better product. Some of the lower-scoring multivitamins had more nutrients listed than the top performers, but used inferior forms at inadequate doses.

Amazon ratings are another trap. A product with 4.5 stars and 10,000 reviews isn't necessarily well-formulated — it may simply be heavily marketed or very cheap. Shoppers often rate based on "I felt fine taking it" rather than any measurable outcome. Our scoring looks at the actual ingredient science, not customer sentiment, which is why the ranking sometimes surprises people.

Buying the cheapest option is an obvious risk, but overpaying for marketing is just as common. The average price across our dataset is £16.84, yet some products reach £55.96. You don't need to spend at the top of that range to get a genuinely good product — the best-value pick in our data, the Life Extension Two-Per-Day Multivitamin, costs £29.95 for 120 tablets (two per day, so a 60-day supply) and scores 85.0 out of 100.

People also frequently buy multivitamins expecting them to compensate for a poor diet. A multi can fill genuine micronutrient gaps, but it won't deliver the fibre, phytonutrients, or macronutrients you'd get from whole food. Think of it as insurance, not a replacement — and prioritise products that address the specific nutrients most likely to be low in a UK diet: D3, B12, magnesium, and zinc.

Types and Forms Explained

Tablets are the most common format in our dataset, appearing in four separate product variants, with further tablet options across different naming conventions. Tablets are generally the most shelf-stable format and tend to allow for higher nutrient loads per serving. The downside is that some people find them harder to swallow, particularly larger two-a-day tablets. Coated tablets tend to be easier on the stomach than uncoated ones.

Capsules are worth considering if you have digestive sensitivities. They typically dissolve faster than tablets and often don't contain binders or fillers that some people react to. Two products in our dataset come in capsule form, and they scored well — the Life Extension Two-a-Day Multivitamin in capsule format scored 82.0 out of 100. The trade-off is that capsules sometimes hold slightly lower doses due to volume constraints.

Two products in our dataset use a tablets-plus-capsules combination format — typically where certain nutrients are separated into different delivery mechanisms to improve absorption or avoid interactions. These are generally the most sophisticated formulations but also tend to be more expensive and require remembering to take both components.

Chewables appear in two products and suit people who struggle with swallowing tablets or capsules, including older adults and those with swallowing difficulties. The limitation is that chewable formats often contain added sugars or sweeteners and can be harder to formulate at full therapeutic doses. They're better than skipping a multi altogether, but generally not the optimal choice for adults who can swallow standard tablets.

What to Expect to Pay

Prices in our dataset run from £3.91 to £55.96, with an average of £16.84. At the very low end — under £6 — you're typically looking at supermarket own-brands or basic formulations using synthetic B vitamin forms, minimal doses, and no third-party testing. They're not harmful, but the nutritional return is limited.

In the £8 to £17 range, quality improves significantly. The Life Extension Two-a-Day Multivitamin in tablet form is available from around £8.95 for 60 tablets and scores 82.0 out of 100 — a reasonable entry point if you want a properly formulated multi without committing to a large upfront cost. The 120-tablet versions at £15–£17 bring the cost per day down further.

The best-value product in our entire analysis is the Life Extension Two-Per-Day Multivitamin at £29.95 for 120 tablets. At two tablets per day, that works out to roughly 50p per day for a product that scored 85.0 out of 100. It uses methylated B vitamins, is iron-free, and provides genuinely meaningful doses across key micronutrients. For most UK adults, this price point represents the sweet spot between quality and cost.

Above £30, you're paying for premium branding, more complex formulations, or specialist additions like adaptogens or additional antioxidants. These can be worthwhile for specific needs, but a standard healthy adult is unlikely to notice a meaningful difference between a well-formulated £17 product and a £55 one. Spend more only if you have a specific health reason to.