Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Midday sun holds the key to good health

30.05.2005


Scientists at The University of Manchester have today unveiled new research which claims that going out in the midday sun, without sunscreen, is good for you.



The research, led by ultra-violet radiation expert Ann Webb, supports claims that exposing unprotected skin to the sun for short periods helps the body to produce essential Vitamin D.

Dr Webb has produced new figures which not only predict when is the best time to expose unprotected skin to the sun in order to maximise Vitamin D production, but also for how long – depending on location. She has calculated that ‘ten to fifteen minutes* at noon’ is the optimum time for the average person in the UK to spend in the sun without the use of sunscreen.


“Our calculations have found that the best time to be out in the sun if you want to maximise Vitamin D production and its benefits is midday. This is when the sun is highest in the sky and this is when there is more UVB radiation in the spectrum which triggers Vitamin D production in the skin,” says Dr Webb.

Vitamin D promotes the absorption of calcium and phosphate from food and is essential in the formation of bones and teeth. A deficiency of Vitamin D leads to a failure of the bones to grow and causes rickets in children and osteoporosis in adults. Recent research also suggests that Vitamin D can help reduce the risks of colon, breast and prostate cancer.

Dr Webb, says: “The two sources of Vitamin D are through your skin or through foods like sardines (fatty fish), but because our everyday diet isn’t very rich in the vitamin it is essential that we get it from the sun”.

“You do not need to sunbathe to get your Vitamin D and we are not advocating people do not protect themselves with sunscreen, but if you put sunscreen on before you step out of the house you will not reap any health benefits provided naturally by the sun. After a short period of unprotected exposure you should cover up or put on sunscreen to avoid sunburn.”

The research, which has been carried out in conjunction with experts at the Norwegian Institute for Air Research, uses computer simulations based on global UV data to calculate optimum times for Vitamin D production based on season, time and latitude. The programme can be run for any time of day and can calculate optimum exposure times for any location in the UK or abroad.

*Figures for optimum Vitamin D sun exposure this Bank Holiday weekend:
Edinburgh – 11 minutes
Manchester, Leeds, Liverpool – 10 minutes
London – 9 minutes
Devon and Cornwall – 9 minutes
Marseille – 7 minutes
Madrid – 7 minutes
Athens – 6.5 minutes

(Figures based on full sun exposure at midday on Bank Holiday Monday (May 30th) with a cloudless sky for a fair-skinned person wearing t-shirt and shorts or skirt. People who tan easily would need to spend slightly longer in the sun, and naturally pigmented people require even more sun exposure.)

Simon Hunter | alfa
Further information:
http://www.manchester.ac.uk/press/title,27436,en.htm

More articles from Health and Medicine:

nachricht Researchers release the brakes on the immune system
18.10.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Norovirus evades immune system by hiding out in rare gut cells
12.10.2017 | University of Pennsylvania School of Medicine

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>