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Vitamin D in winter: why your levels can decrease

Illustration showing why the production of vitamin D by the skin decreases in winter when exposure to sunlight is low

💡 Did you know? In winter, the lack of sunlight can lead to a decrease in your vitamin D levels.

During winter, sunlight is significantly reduced. Days are shorter and the weather is often marked by grey skies, rain or snow. As a result, this period can have a direct impact on your vitamin D levels.

Why does vitamin D decrease in winter?

Vitamin D is produced by our skin under the action of sunlight. Therefore, less sun exposure means lower production of vitamin D.

What are the effects of a lack of vitamin D?

Low vitamin D levels can lead to:

  • persistent fatigue
  • weakened immunity
  • muscle weakness
  • bone fragility, particularly in older adults

How can you address it?

We cannot always pack our bags and head to the sun… 😄 Fortunately, a few simple steps can help:

  • An adapted diet: fatty fish (mackerel, sardines) and eggs. These foods provide nutrients that help your body maintain adequate vitamin D levels.
  • Supervised supplementation: supplements are available and should be taken following the advice of your doctor or pharmacist.

Good to know

🔬 Vitamin D levels can be measured with a simple blood test. Do not hesitate to discuss this with your doctor.

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