How to Raise Vitamin D With Food (and When You Can't)

Vitamin D is one of the most common shortfalls in the UK, and one of the trickiest to fix with food alone. If a test has shown yours is low, or sitting mid-range, here's what genuinely helps, what food can and can't do, and where a supplement sensibly comes in.

The reason the UK struggles is simple: your body makes vitamin D from sunlight on skin, but from roughly October to March the sun here isn't strong enough to produce much of it. That's why the NHS itself recommends most people consider a supplement through autumn and winter. Food becomes the everyday backstop rather than the whole solution.

It's also worth knowing the difference between "normal" and "optimal." NHS "normal" starts around 50 nmol/L, but many practitioners aim for 75 to 125 for how you actually feel, mood, energy and immune resilience. Sitting at 55 can be "fine" on paper and still leave something on the table.

The best food sources, in rough order, are oily fish (salmon, mackerel, sardines, trout), then egg yolks, UV-exposed mushrooms, and fortified foods such as some cereals, plant milks and spreads, with small amounts in red meat and liver. The honest bit: even the best food sources are modest compared with what strong sun or a supplement provides.

A realistic food approach looks like oily fish two to three times a week, eggs regularly, fortified breakfast options, and mushrooms where you can. For many people that meaningfully helps, but in winter, for a genuine deficiency, it often won't fully correct things on its own.

Absorption matters here too. Vitamin D is fat-soluble, so it's taken up better alongside dietary fat, eating your salmon or eggs as part of a normal meal, rather than a fat-free one, helps. Magnesium supports how the body handles vitamin D as well, so nuts, seeds and leafy greens play a quiet supporting role.

And now the honest part about limits: if you're genuinely deficient, food alone usually won't get you there, particularly in a British winter. This is one nutrient where a supplement is often the sensible route, which is exactly what NHS advice reflects. Equally, more is not better, vitamin D is fat-soluble, so excess accumulates, and mega-dosing can do harm.

Some people are more at risk and worth being proactive: those with darker skin, anyone who spends little time outdoors or covers up, older adults, and, realistically, everyone living at UK latitudes through winter. If that's you, testing and a plan beat hoping.

The practical problem is that "eat more oily fish" is easy to agree with on Monday and forget by Wednesday. A plan that actually schedules oily fish a couple of times a week, pairs it with fat for absorption, and works around your tastes is what turns good intentions into a routine that moves your levels.

That's how Nutridly handles it. If your results flag low vitamin D, it weaves oily fish, eggs, mushrooms and fortified foods into your week at sensible frequencies, pairs them for absorption, and explains why, while being clear that food is the backstop and a winter supplement may still be needed. It's a nutrition tool, not a medical service, so for supplements and persistent lows, check with your GP or pharmacist first.