From October to March, many Dutch people stay indoors too much. Yet regular outdoor time is crucial for vitamin D production.
Vitamin D and Sunlight
Going outside offers more than fresh air—it's key to vitamin D synthesis. Our skin produces 70 to 90 percent of the body's vitamin D when exposed to sunlight.
Why Don't We Get Outside Enough?
Cold weather and busy schedules often win out, even though we'd like to. Notably, 17 percent of people simply forget.
How Much Outdoor Time Do You Need?
The Health Council recommends 15 to 30 minutes daily between 11 a.m. and 3 p.m., with head and hands bare for optimal skin exposure.
Tips for More Time Outdoors
Build it into your routine, like daily exercise or hydration. Walk during lunch or head to the supermarket on foot.
Consequences of Vitamin D Deficiency
Effects aren't immediate but significant: weak muscles, fractures, and mobility loss. In seniors, it raises osteoporosis risk with soft, painful bones. Children face rickets—weak, bowed limbs.
