In the winter months, especially in the UK, many of us don’t get enough vitamin D – mainly because the biggest source is sunlight. To support immune health, bone strength, and muscle function, the NHS recommends adults take a daily vitamin D supplement of 10 micrograms (400IU), staying below the safe upper limit of 4,000IU.
“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. Signs of low vitamin D include fatigue, muscle aches, and weakened bones.
While oily fish, eggs, and vegetables offer a dietary solution, the best vitamin D supplements bridge the seasonal gap. Look out for vitamin D3, which is absorbed more effectively than plant-based D2. Many top formulas also pair D3 with vitamin K2 to ensure calcium reaches your bones and teeth safely.
Before supplementing, consult your GP to determine the right dosage for your specific health needs. From easy-to-use oral sprays and high-strength capsules to vegan gummies, keep reading for the best vitamin D supplements tried and tested.
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I tested sprays, capsules and drops (Sarah Finley/The Independent)The best vitamin D supplements for 2026 are: Best overall – Nutrition Geeks D3 / D3 + K2: £9.99, Amazon.co.ukBest oral spray – BetterYou vitamin D3 4000iu + K2 oral spray: £8.49, Amazon.co.ukBest budget option – Dr Vegan D3 vitamin: £9.99, Drvegan.comBest for absorption – Bare Biology vitamin D spray: £21.95, Barebiology.com
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