Winter & Vitamin D

Winter & Vitamin D


Winter can significantly impact vitamin D levels due to reduced exposure to sunlight. Here's an overview of how winter affects vitamin D and what you can do about it:

Why Vitamin D is Important

Vitamin D plays a crucial role in:

  • Bone Health: It helps the body absorb calcium, promoting healthy bone development and maintenance.

  • Immune Function: It supports the immune system, helping to fight off infections.

  • Mood Regulation: Adequate levels are associated with improved mood and potentially lower risks of depression.

  • Fertility: Research suggests that adequate levels of vitamin D can positively influence reproductive health and outcomes.
    Find out more about Vitamin D and Fertility in our Health & Wellbeing blogs

Winter and Reduced Sunlight Exposure

  • Shorter Days: There are fewer daylight hours during winter.

  • Weaker Sunlight: The sun’s rays are less direct, especially in higher latitudes.

  • Clothing: People wear more clothing in winter, which covers the skin and reduces the area exposed to sunlight.

  • Indoor Activities: Colder weather often leads to more time spent indoors.

Sources of Vitamin D

  1. Sunlight: The primary natural source is UVB radiation from sunlight.

  2. Food: Few foods naturally contain vitamin D. Fatty fish (like salmon and mackerel), liver, egg yolks, and fortified foods (such as milk, orange juice, and cereals) are good sources.

  3. Supplements: Vitamin D3 supplements can help maintain adequate levels, especially during winter.

Tips to Maintain Vitamin D Levels in Winter

  • Spend Time Outdoors: Try to get outside during daylight hours, even on cloudy days.

  • Eat Vitamin D-Rich Foods: Incorporate foods high in vitamin D into your diet.

  • Consider Supplements: If you’re unable to get enough vitamin D from sunlight and food, supplements can be an effective alternative.

  • Check Levels: If you suspect you might be deficient, a blood test can measure your vitamin D levels. Consult with a healthcare provider for advice on supplementation.


Maintaining adequate vitamin D levels is essential for overall health, especially during the winter months when natural sunlight exposure is limited.

For more information on Winter and Vitamin D, book an appointment with our acupuncturist and Traditional Chinese Medicine specialist, Kylie Stabler or Naturopath Alice Plant.

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Vitamin D & Fertility

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Managing Infertility