Sunshine vitamin: Do not substitute vitamin D without hesitation

The days are getting shorter and the sun's strength is fading. In autumn and winter, vitamin D production in our latitudes isn't always sufficient. Nevertheless, over-the-counter supplements shouldn't be taken lightly. Many pharmacies now also offer vitamin D testing.

A diet rich in vitamin D helps replenish stores before winter. / © Adobe Stock/bit24

Almost 90 percent of vitamin D is found in the Skin . In autumn and winter, UVB radiation becomes weaker, and the body's own production can decline significantly – with potential health consequences. The Baden-Württemberg State Pharmacists' Association (LAV) points this out in a press release .

This makes it all the more important to actively enjoy autumn and spend time outdoors, according to the LAV. "A daily walk, preferably at lunchtime, can help replenish reserves in time for winter. As long as the weather permits, you can still wear short sleeves to maximize your skin's exposure to daylight," says Friederike Habighorst-Klemm, patient representative and board member of the LAV Baden-Württemberg. A balanced diet rich in vitamin D, such as fatty fish, egg yolk, or certain mushrooms, can also contribute. However, this cannot compensate for a true vitamin D deficiency.

"Low vitamin D levels often go unnoticed for a long time, but in the long run, they can increase the risk of infections, muscle weakness, or even bone diseases. Even our mental strength is influenced by vitamin D," explains Habighorst-Klemm. "Older people, women going through menopause, chronically ill people, those in need of care, or people with dark skin are particularly susceptible to vitamin D deficiency."

Therefore, vitamin D supplementation can be beneficial for many people, but not without determining whether a deficiency actually exists. "Anyone who has symptoms such as persistent fatigue, frequent infections, muscle weakness, or low mood should consult a doctor to determine whether they have a vitamin D deficiency," advises the pharmacist. Vitamin D status can be checked via a blood test. Many Pharmacies offer such tests.

Since the risk of vitamin D overdose should not be underestimated, one should not resort to over-the-counter supplements without thinking. Instead, consultation with a pharmacist or doctor is advisable. "Especially people who take medication on a long-term basis, have pre-existing medical conditions, or use dietary supplements should not approach this issue on their own and should seek professional advice," emphasizes Habighorst-Klemm. This is the only way to ensure that those affected receive all the necessary information regarding the appropriate dosage, safe use, and possible interactions with other medications.