2011-10-05 07:36:44
By Michelle Roberts Health reporter, BBC News
Fair-skinned people who are prone to sunburn may need to take supplements to
ensure they get enough vitamin D, say experts.
It appears that those with pale skin, while not deficient, may still be lacking
in the essential vitamin that the body makes from sunlight.
The Cancer Research UK-funded team say that even with a lot of sun exposure,
those with fair skin may not be able to make enough vitamin D.
And too much sun causes skin cancer.
Clearly, for this reason, increasing sun exposure is not the way to achieve
higher vitamin D levels in the fair-skinned population, say the researchers.
But taking supplements could be.
Their work examined 1,200 people.
Of these, 730 were found to have "lower than optimal" vitamin D levels - and
many of these were people with very pale, freckled skin.
Extra boost
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Fair-skinned individuals who burn easily are not able to make enough vitamin D
from sunlight and so may need to take vitamin D supplements
Prof Julia Newton-Bishop
Supplements are already recommended for groups at higher risk of deficiency.
This includes people with dark skin, such as people of African-Caribbean and
South Asian origin, and people who wear full-body coverings, as well as the
elderly, young children, pregnant and breastfeeding women and people who avoid
the sun.
Based on the latest findings, it appears that pale-skinned people should be
added to this list.
Vitamin D is important for healthy bones and teeth.
A level less than 25nmol/L in the blood is a deficiency, but experts
increasingly believe that lower than 60nmol/L are suboptimal and can also be
damaging to health.
Most people get enough vitamin D with short exposures to the sun (10 to 15
minutes a day). A small amount also comes from the diet in foods like oily fish
and dairy products.
But people with fair skin do not seem to be able to get enough, according to
Prof Julia Newton-Bishop and her team at the University of Leeds.
Part of the reason might be that people who burn easily are more likely to
cover up and avoid the sun.
But some fair-skinned individuals also appear to be less able to make and
process vitamin D in the body, regardless of how long they sit in the sun for.
Hazel Nunn, of Cancer Research UK, explains how to increase vitamin D levels if
you're pale
Prof Newton-Bishop said: "It's very difficult to give easy advice that everyone
can follow. There's no one-size-fits-all.
"However, fair-skinned individuals who burn easily are not able to make enough
vitamin D from sunlight and so may need to take vitamin D supplements."
Hazel Nunn, of Cancer Research UK, said: "It is about striking a balance
between the benefits and harms of sun exposure.
"People with fair skin are at higher risk of developing skin cancer and should
take care to avoid over-exposure to the sun's rays.
"If people are concerned about their vitamin D levels, they should see their
doctor who may recommend a vitamin D test."
She said it was too soon to start recommending supplements, but said most
people could safely take 10 micrograms a day of vitamin D without any
side-effects.