New health advice recommends short spells in the sun - without suncream and in the middle of the day.
Seven organisations have issued joint advice on vitamin D, which the body gets from natural sunlight.The nutrient keeps bones strong, and protects against conditions like osteoporosis.
The guidance was drawn up because it is thought fears about skin cancer have made people too cautious about being in the sun.
Cancer Research UK and the National Osteoporosis Society are among the bodies which agree that "little and frequent" spells in summer sunshine several times a week can benefit your health.
The experts now say it is fine to go outside in strong sun in the middle of the day, as long as you cover up or apply sunscreen before your skin goes red.
'Too negative'
Professor Rona Mackie, from the British Association of Dermatologists, said: "Total sun protection with high factor suncream on all the time is not ideal, in terms of vitamin D levels.
"Even Australia has changed its policy on this. They're now producing charts showing parts of Australia where sun protection may not be required during some parts of the year.
"Some of the messages about sun exposure have been too negative. UK summer sunshine isn't desperately strong. We don't have many days in the year when it is very intense.
"What's changed is that we're now saying that exposure of 10 to 15 minutes to the UK summer sun, without suncream, several times a week is probably a safe balance between adequate vitamin D levels and any risk of skin cancer."
Official government advice already recommends vitamin D supplements for pregnant women and children aged under five.
But the experts who wrote the joint statement say mothers often are not made aware of this recommendation. They suggest women consult their GP.
Winter levels of vitamin D can be helped by a break in the tropical sun - or by eating oily fish, liver and fortified margarine.
source: http://www.bbc.co.uk
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