In the UK, sunlight between October and early March is not strong enough for our skin to produce sufficient vitamin D.
This is why the NHS advises adults and children aged four and over to consider taking a daily supplement containing 10 micrograms (400 IU) of vitamin D during autumn and winter.
Those with little or no sunlight exposure may need supplementation throughout the year.
At Royal Oak Health, we believe good nutrition starts with understanding what your body needs and why.
Our Winter Sunshine bundle brings together three formulations containing vitamin D3 with K2 and magnesium, vitamin C, and zinc with copper.
Here is the science behind these nutrients and their roles in everyday health.
1. Vitamin D3, K2 and magnesium: supporting bones and muscles
Vitamin D helps the body absorb and use calcium and phosphorus. It contributes to the maintenance of normal bones and teeth, normal muscle function and the normal function of the immune system.
Our formulation combines vitamin D3 with vitamin K2 and magnesium, which have complementary nutritional roles:
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Vitamin K contributes to the maintenance of normal bones and normal blood clotting.
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Magnesium contributes to normal muscle function, the maintenance of normal bones and teeth, normal energy-yielding metabolism and the reduction of tiredness and fatigue.
Vitamin D has particular seasonal relevance in the UK, while these other nutrients support normal bodily functions throughout the year.
2. Vitamin C: more than immune support
Vitamin C contributes to the normal function of the immune system and helps protect cells from oxidative stress. It also supports normal collagen formation, which is important for the normal function of skin, blood vessels, bones and cartilage.
Additionally, vitamin C increases iron absorption and contributes to normal energy-yielding metabolism and the reduction of tiredness and fatigue.
Our product: Purefill Vitamin C 1000mg provides a convenient way to supplement vitamin C intake. This is a supplement dose, rather than a daily requirement for everyone. A varied, balanced diet remains the foundation of good nutrition.
3. Zinc with copper: two essential minerals
Zinc and copper are trace minerals that contribute to a range of essential bodily functions.
Zinc contributes to normal immune function, normal cognitive function and the protection of cells from oxidative stress. It also contributes to normal DNA synthesis and has a role in cell division.
Copper contributes to normal immune function, normal iron transport, normal energy-yielding metabolism and the maintenance of normal connective tissues. Like zinc, it also helps protect cells from oxidative stress.
Our Zinc with Copper formulation supplies both minerals. Their appropriate intake depends on individual needs and the amounts obtained from food and supplements. More is not always better: excessive zinc intake over time can interfere with copper absorption.
Making informed choices this winter
Winter is a useful time to review your nutritional routine, but it does not automatically mean you need more of every nutrient.
Start with a varied, balanced diet, consider the NHS guidance on vitamin D, and use supplements thoughtfully. Fruit and vegetables provide vitamin C, while foods such as nuts, seeds, wholegrains and legumes contribute minerals including magnesium, zinc and copper.
Supplements can help address nutritional gaps, but they are not a substitute for a balanced diet or a guarantee of better health. Follow the recommended intake on each product label and seek professional advice if you have questions about your individual requirements.
A science-led approach to winter nutrition
The seasonal case for vitamin D is clear: during the UK's autumn and winter months, we cannot rely on sunlight to produce enough. The other nutrients in our Winter Sunshine bundle have recognised roles in normal immune function, bone health, muscle function and energy metabolism throughout the year.
Good nutrition is not about quick fixes. It is about understanding the evidence and making informed choices.
Three products. Complementary nutrients. A science-led approach to winter nutrition.
Explore the Winter Sunshine bundle at Royal Oak Health.
Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Follow the recommended intake and directions on each product label. NHS vitamin D guidance is general public health advice, not an endorsement of this bundle.
