As spring arrives and sunlight increases, many people are wondering if they can discontinue taking vitamin D supplements. Whereas increased sun exposure allows the body to produce vitamin D naturally, experts say it’s not a simple yes or no answer for everyone.
Renger Witkamp, a professor and vitamin expert at Wageningen University, explains that vitamin D reserves built up during the warmer months are depleted over the winter. The body then begins to replenish these reserves through sun exposure. However, he cautions against immediately stopping supplementation for all individuals.
Health authorities generally recommend approximately 30 minutes of daily sun exposure with uncovered faces and short sleeves during the spring, summer, and fall. But certain groups remain at higher risk of vitamin D deficiency and should continue taking supplements.
These at-risk groups include children under four years aged, individuals over 70, pregnant women, people with darker skin, and those who consistently wear concealing clothing outdoors. Severe deficiencies can lead to rickets in children, bone demineralization, and muscle weakness. A concerning example cited by Witkamp involved heavily veiled pregnant women in Sweden who experienced dangerously low vitamin D levels, complicating their deliveries.
It’s key to note that age alone isn’t necessarily a cause for deficiency; a lack of physical activity and limited time outdoors are more significant factors. Older adults who remain active and spend time outside often maintain adequate vitamin D levels. Laboratory values between 75 and 120 nmol/liter are considered healthy, with 80 nmol/liter being an ideal target, though the optimal level remains somewhat unclear.
Approximately 60% of people in the Netherlands currently take vitamin D supplements, often without a clear medical need. For those who do supplement, choosing a simple, affordable store brand is recommended. This information is particularly relevant as vitamin D plays a crucial role in overall health and well-being, and understanding individual needs is key to maintaining optimal levels.
