Multivitamins

What a multivitamin is for

A multivitamin puts a range of vitamins and minerals into one daily dose, usually around the Nutrient Reference Value (NRV) printed on UK labels. Think of it as a baseline that covers the small gaps most weeks leave behind. It is not a fix for one low nutrient. If a blood test or your diet points at a single shortfall, one single vitamin at a proper dose usually does more than a multi that gives you a fraction of everything.

Two things decide whether a formula earns its price: how much of each nutrient it holds and which form that nutrient takes. A label with 26 entries looks generous, but several of them can sit at a token percentage of the NRV. Vitamin D is the useful yardstick in the UK: the NHS names 10 mcg (400 IU) a day for adults, and many multis stop well below that. If yours does, add vitamin D3 on its own in the darker months rather than doubling your multi.

Forms worth looking for on the label

• Vitamin D3 (cholecalciferol) rather than D2. D3 is the form the body makes in sunlight.
• Methylcobalamin or adenosylcobalamin for B12, forms the body uses without a conversion step.
• Methylfolate instead of plain folic acid, for the same reason.
• Magnesium as citrate or bisglycinate, not oxide. Oxide is cheap and poorly absorbed, so a large number on the label can mean little in practice.
• Iron only where it belongs. Plenty of adult multis leave iron out deliberately, because men and post-menopausal women rarely need extra. Choose an iron-containing multi only if you know you need it.

How we choose the multivitamins we stock

We judge every formula on three things: the form of each nutrient, the dosage, and whether the combination makes sense together. So we favour multis built on D3, methylated B vitamins and absorbable magnesium, and we pass on formulas that pad the label with a long list at 5% NRV. We are brand-neutral: we stock what delivers, not what pays us most. We buy straight from the brands, our compliance team checks each product before it goes live, and independent labs spot-check batches. More than ten years of doing this shapes what we leave out as much as what we keep. You can read how we select our brands.

Who a multivitamin genuinely suits

It suits people with a narrow or changing diet, plant-based eaters who need reliable B12, iodine and D3, adults over 50 whose absorption of B12 drops, and anyone in a stretch of long days and rushed meals. It also suits people who would rather take one product than five. If you already take a magnesium or omega-3 product, check the overlap first: a multi plus separate Minerals can push a single nutrient higher than you intended.

Be realistic about what you will feel. If your intake was already adequate, a multivitamin is quiet insurance and you will notice nothing. Where a low intake of B vitamins, iron or vitamin D was involved, most people report a difference in tiredness after two to three weeks of daily use, not overnight. That steady, unspectacular support is exactly what a multi is good at.