Best vitamin D supplements 2026, tested by a wellness expert

In the winter months, especially in the UK, many of us don’t get enough vitamin D – mainly because the biggest source is sunlight. This is why the NHS advises adults to take a vitamin D supplement, to support bone, skin and muscle health, while also protecting your immune system.

Whether you prefer a tablet or a spray, you might be wondering if there’s an optimal daily dose when it comes to the best vitamin D supplements. For adults, experts recommend taking 10 micrograms or 400IU (International Units). The NHS recommend taking no more than 4000IU a day.

But are there people who may need more of the supplement? “People of colour and those who may have moved from hotter countries [may need more], because their body is used to higher levels of sun exposure. It’s also really important for pregnant women, but it can benefit everyone,” explains Dr Ahmed El Muntasar, NHS GP.

Of course, vitamin D isn’t just found in sunlight – you can get some through your diet, too, with Dr Ahmed explaining that the “best sources of vitamin D come from oily fish, eggs and lots of vegetables.” While he adds that the main causes of a deficiency are: “Low sun exposure and having an unbalanced diet. People with vitamin d deficiency can get muscle aches, fatigue, low energy and weakened bone health, which can then increase the risk of fractures as a result.’

So, what source of vitamin D is best? “Vitamin D2 is from plants, while D3 is from animals. D3 is usually preferred and recommended,” adds Dr Ahmed. Some D3 supplements are also paired with vitamin K2, which helps direct calcium into the bones and teeth rather than allowing it to build up in arteries, kidneys or soft tissues.

Before you start taking vitamin D, it’s worth speaking speak with your GP to find out which dose is right for you. Once you know the suitable dosage, below, you’ll find my guide to the best vitamin D supplements, including capsules, sprays and gummies.

Read more: The 13 best supplements you should actually take, according to experts

The best vitamin D supplements for 2026 are:

• Best overall – Nutrition Geeks D3 / D3 + K2: £9.99, Amazon.co.uk
• Best oral spray – BetterYou vitamin D3 4000iu + K2 oral spray: £8.49, Amazon.co.uk
• Best budget option –  Dr Vegan D3 vitamin: £8.99, Drvegan.com
• Best gummies – WUKA vitamin D3 K2 gummies for periods: £15.99, Wuka.co.uk

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