Can You Get Vitamin D From the Sun in Winter in Europe?
In most of Europe the winter sun is too weak to make vitamin D. See which places still get usable UV in December, January and February, and how long a full dose takes.
Vitamin D and sun guides
Plain-language guides to getting vitamin D from the sun on holiday: how strong the sun must be, how long you need, what changes with age, and where to go in each season. Numbers come from the same model as the map.
UV Index 2.5 Explained: Why It Is the Line for Vitamin D
What the UV Index means, why Sundi counts vitamin D only from 2.5 up, how clouds and time of day change it, and how many minutes you need at each level.
How Long in the Sun for Vitamin D? By Skin Type and Age
Minutes of midday sun for a full vitamin D dose and the time to burn, for all six skin types, at age 30 and 65, at UV Index 3, 6 and 9.
Vitamin D After 60: How Age Changes What the Sun Gives You
Ageing skin makes less vitamin D from the same sun. See how much longer you need at 65 or 75, and the best sunny destinations for older travellers in winter.
Best Winter Sun for Vitamin D: Where to Go From November to March
Where the sun is strong enough for vitamin D between November and March, ranked month by month, with the places that are too hot, too cold or rainy left out.
Best Places for Vitamin D in Spring, Summer, Autumn and Winter
The best sea-holiday destinations for vitamin D in each season, compared on sun hours, time to a full dose, heat and rain. Based on monthly climate data.
Sun Safety on a Vitamin D Holiday: Get the Dose, Skip the Burn
How to get vitamin D from sun on holiday without burning: timing, reflection from water and sand, sunscreen, skin type, kids and heat, with burn times at each UV level.
Sunny Holiday or Vitamin D Supplement? What a Trip Can and Cannot Do
What a sunny holiday does for your vitamin D, how fast a reserve runs down, who needs extra care, and why a trip does not replace a supplement your doctor recommends.