Why Vitamin D Is So Important During Autumn and Winter
As the days get shorter and the temperatures drop, there's one essential vitamin that deserves a little extra attention – Vitamin D.
Autumn and winter bring cosy evenings, crisp mornings and plenty of reasons to stay indoors. But with fewer hours of sunlight, our bodies can struggle to produce enough Vitamin D naturally.
In the UK, this is particularly important between October and early March, when sunlight isn't strong enough for our skin to make sufficient Vitamin D.
So, why is Vitamin D so important, how much do we need, and what can we do to maintain healthy levels throughout the colder months?
What Is Vitamin D and Why Do We Need It?
Often referred to as the sunshine vitamin, Vitamin D is a fat-soluble vitamin that plays several important roles in keeping our bodies healthy.
Unlike most vitamins, our bodies can produce Vitamin D naturally when our skin is exposed to sunlight. However, during autumn and winter, this natural production becomes much more difficult.
Vitamin D contributes to several essential functions:
- Normal immune system function: Vitamin D helps support the normal functioning of the immune system.
- Healthy bones and teeth: It contributes to the maintenance of normal bones and teeth.
- Normal muscle function: Vitamin D helps maintain normal muscle function.
- Calcium absorption: It contributes to the normal absorption and utilisation of calcium and phosphorus.
- Normal blood calcium levels: Vitamin D helps maintain normal calcium levels in the blood.
These benefits make Vitamin D an important nutrient all year round, but particularly during the darker months.
Why Is Vitamin D Especially Important in Autumn and Winter?
During spring and summer, many of us can produce enough Vitamin D through exposure to sunlight.
However, from October to early March, the sun sits lower in the sky across the UK. This means there isn't enough UVB radiation reaching our skin to produce adequate amounts of Vitamin D.
Even spending time outdoors during these months may not provide enough sunlight for our bodies to make the Vitamin D we need.
That's why the NHS recommends that everyone should consider taking a daily Vitamin D supplement containing 10 micrograms (400 IU) during autumn and winter.
It's a simple addition to your daily routine that can help you maintain an adequate Vitamin D intake when sunshine is in short supply.
Can We Get Enough Vitamin D from Food?
Although sunlight is our main natural source of Vitamin D, certain foods can help contribute to our daily intake.
Some dietary sources include:
- Oily fish: Such as salmon, sardines, trout and mackerel.
- Egg yolks: A natural source of small amounts of Vitamin D.
- Fortified foods: Including some breakfast cereals, fat spreads and plant-based milk alternatives.
- Red meat and liver: Which contain varying amounts of Vitamin D.
However, relatively few foods naturally contain significant quantities of Vitamin D, making it difficult for many people to obtain enough through diet alone.
This is one reason why supplementation is recommended during the autumn and winter months.
Who Should Pay Particular Attention to Their Vitamin D Intake?
While everyone in the UK should consider Vitamin D supplementation during autumn and winter, some people may need to take supplements throughout the year.
According to NHS guidance, this includes:
- People who spend very little time outdoors, including those who are housebound.
- People who usually cover most of their skin when outdoors.
- People with darker skin, including those with African, African-Caribbean or South Asian backgrounds, who may not produce enough Vitamin D from sunlight in the UK.
Older adults may also benefit from paying particular attention to their Vitamin D intake, as maintaining normal bones and muscle function becomes increasingly important with age.
If you're unsure whether you're getting enough Vitamin D, speak to your pharmacist or healthcare professional for advice.
How Much Vitamin D Do We Need?
For adults and children aged 4 years and over, the NHS recommends considering a daily supplement containing 10 micrograms (400 IU) of Vitamin D during autumn and winter.
For those at greater risk of Vitamin D deficiency, supplementation is recommended throughout the year.
Vitamin D supplements are available in different strengths, so it's important to choose one that's appropriate for your individual needs.
Higher-strength supplements are not necessarily better for everyone. Adults should not exceed 100 micrograms (4,000 IU) of Vitamin D daily from all sources unless advised by a healthcare professional.
Vitamin D2 vs Vitamin D3: What's the Difference?
You may have noticed that Vitamin D supplements are available in two main forms:
Vitamin D2 (ergocalciferol) – Usually derived from plant or fungal sources.
Vitamin D3 (colecalciferol) – The same form of Vitamin D that our bodies naturally produce when exposed to sunlight.
Both forms can increase Vitamin D levels, although research suggests Vitamin D3 is generally more effective at raising and maintaining Vitamin D levels in the blood.
Vitamin D3 is therefore a popular choice for everyday supplementation.
Make Vitamin D Part of Your Winter Wellness Routine
Looking after your wellbeing during the colder months doesn't have to be complicated.
Alongside a balanced diet, regular physical activity and sufficient sleep, maintaining an adequate Vitamin D intake is one simple way to support your health.
At Northumbria Health, we offer a 1 year supply of Vitamin D3 Softgels to help you incorporate this essential nutrient into your daily routine.
Whether you're looking to maintain your Vitamin D intake during the winter months or have been advised to take a particular strength, it's important to select a supplement that meets your individual requirements.
A Little Sunshine Support, Whatever the Weather
We might not be able to control the British weather, but we can take simple steps to look after our health throughout the changing seasons.
With shorter days and less sunshine ahead, November is the perfect time to think about your Vitamin D intake.
Because taking care of your health shouldn't stop when the sunshine does.
Disclaimer: Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Always follow the recommended dosage on the product label. If you are pregnant, breastfeeding, taking medication or have an existing medical condition, consult a healthcare professional before taking supplements.
Sources: NHS – Vitamins and minerals: Vitamin D; NHS – Vitamin D guidance.