Showing posts with label Vitamin D. Show all posts
Showing posts with label Vitamin D. Show all posts

Thursday, January 7, 2016

Are You Getting Enough Vitamin D?

Am I getting enough Vitamin D?

  • By Emer Delaney - Dietitian
  • Are your ‘sunshine vitamin’ levels low? Discover why you need vitamin D, how to get more and what to do if you're concerned about your levels...
    Am I getting enough Vitamin D?

    Why do we need Vitamin D?

    Vitamin D is made in our skin via direct exposure to sunlight. Our liver and kidneys then convert it into a form we can use. Vitamin D is extremely important for strong bones and teeth, as it helps us absorb the calcium we eat and it also controls the amount of calcium in our blood.  It’s really important that our vitamin D levels aren’t low or our body won’t absorb the calcium we eat.  
    There aren't any visual signs of vitamin D deficiency. If our levels are very low and we are severely deficient, we are at risk of developing weaker bones which is a condition known as osteomalacia. Severe deficiency in children may result in soft skull or leg bones and their legs may look curved or bow-legged, which is a condition called rickets.  As low levels are common in the UK, it's worth getting tested if you're concerned. Ask your GP for a blood test.

    Vitamin D levels explained
    Vitamin D blood rangesClassification
    Under 25nmol/LDeficient
    25 - 50nmol/LInsufficient
    50-75nmol/LSufficient
    Over 75nmol/LOptimal

    How much sun do we need? 

    During the summer months, approximately 20-30 minutes of direct sunlight two to three times a week should be enough for a fair skinned person to make the vitamin D they need.  For the elderly and darker skinned people, exposure time or frequency needs to be increased two to tenfold to get the same level of vitamin D synthesis as fair skinned individuals. 
    A word of caution though, too much sun exposure can be damaging due to the risk of developing skin cancer. Only spend a small amount of time in the sun without sunscreen either early in the morning or late in the afternoon and the rest of the time be sure to cover up and avoid any chance of sunburn. 

    Amount of sun required to compensate for 49 days of no exposure
    Skin typeMinutes of July sun required
    Fair10 - 12 mins
    Asian30 mins
    African/ Afro-Caribbean120 mins

    What affects our Vitamin D levels?

    Several different factors can affect our vitamin D levels such as skin pigmentation, age, season, clothing and use of high factor sunscreens. As elderly people have thinner skin they are unable to make as much of the vitamin as younger people. Also, the position of the UK means that 90% of it lies above the latitude that permits exposure to the sun rays necessary for vitamin D synthesis. The southern part of the country is marginally better positioned for vitamin D synthesis (the closer you are to the equator the better). All of these factors will have an effect on our levels.
    Approximately 60–70% of the UK adult population have insufficient levels of vitamin D in winter and spring and 16% are considered deficient. At the moment, there are no recommendations for daily intake. Whilst UK recommendations have not been set for the general population, some groups are at higher risk for developing deficiencies.  These include:
    • Pregnant and breastfeeding women
    • People who have darker skin, such as those of South Asian, African or Afro-Caribbean descent
    • Men and women who are over 65 years of age
    • Babies and children aged six months to five years 
    • Adults who stay out of the sun or cover up when outside 

     Vitamin D in our diet

    Sardines with chickpeas, lemon & parsleyFoods that naturally contain vitamin D include oily fish such as mackerelsardinestinned salmonherring and kippers.  Some foods are fortified with small amounts of vitamin D, including breakfast cereals, infant formula and margarine. There are smaller amounts found in eggs and some red meats, such as duckgoosepheasant and venison however, the exact amount is unknown. Breast milk also contains vitamin D and mums should make sure they aren’t deficient as this will affect the levels in their milk.  

    Vitamin D-rich foods
    Food per portionVitamin D content
    Kipper (140g)35µg
    Herring (140g)31.5µg
    Mackerel (140g)24.5µg
    Tinned salmon (140g)17.5µg
    Sardines (140g)10.5µg
    Duck eggs (2)3.75µg
    Hen eggs (2)2.5µg


Tuesday, December 22, 2015

Vitamin D key to treating IBS?

Is vitamin D the key to treating IBS? 82% of sufferers 'are deficient in the sunshine vitamin' 

  • Scientists found a link between irritable bowel syndrome and vitamin D
  • 82% of IBS patients are vitamin D sufficient, their findings revealed
  • Irritable bowel syndrome is a chronic disorder of the gastrointestinal tract 
  • Doctors suggest people with IBS take vitamin D supplements 


People suffering from irritable bowel syndrome may not be getting enough sunshine, experts believe.
Scientists from the University of Sheffield found that 82 per cent of irritable bowel syndrome patients have insufficient vitamin D levels.
Vitamin D is most commonly produced when sunlight hits your skin, which kicks off vitamin synthesis.
It is also naturally occurring in a number of foods – including milk and tuna.
The study suggests that vitamin D supplements may help alleviate IBS symptoms. 
Scientists revealed that 82 per cent of people with irritable bowel syndrome may be vitamin D deficient. IBS is a 'chronic and debilitating' disorder of the gastrointestinal tract that causes both diarrhea and constipation
Scientists revealed that 82 per cent of people with irritable bowel syndrome may be vitamin D deficient. IBS is a 'chronic and debilitating' disorder of the gastrointestinal tract that causes both diarrhea and constipation

Study leader Dr Bernard Corfe, of the university’s molecular gastroenterology research group said: ‘Our work has shown that most IBS suffers in our trial had insufficient levels of vitamin D.
‘There was an association between the Vitamin D status and the sufferer’s perceived quality of life, measured by the extent to which they reported impact on IBS on life.’ 
IBS is a chronic and debilitating disorder of the gastrointestinal tract, and nearly 15 per cent of the western population are diagnosed sufferers.

IBS affects each patient differently – with some experiencing diarrhea or constipation, or having alternating bowel habits.
Doctors are not sure what causes the condition, but it is known that diet and stress make IBS worse.
Patients with IBS often suffer silently – living with embarrassment because of the nature of the symptoms.
It was clear from our findings that many people with IBS should have their vitamin D levels tested, and the data suggests that they may benefit from supplementation with vitamin D
Dr Bernard Corfe, University of Sheffield 
As a result many people live with the condition diagnosed.
Dr Corfe said: ‘IBS is a poorly understood condition which impacts severely on the quality of life of sufferers.
‘There is no single known cause and likewise no single known cure.’
The team of scientists tested 51 patients to examine their vitamin D levels.
Most of the patients were found to be vitamin D deficient.
Dr Corfe said: ‘Our data provide a potential new insight into the condition and importantly a new way to manage it.
‘It was clear from our findings that many people with IBS should have their vitamin D levels tested, and the data suggests that they may benefit from supplementation with vitamin D.
‘As a result of this exploratory study, we’re now able to design and justify a larger and more definitive clinical trial.’
The vitamin has also recently been linked to lowering blood pressure, as well as reducing the risks of heart and kidney disease. 

Vitamin D is best known as the vitamin that is produced when sunlight hits your skin. Scientists said people with IBS might benefit from taking vitamin D supplements
Vitamin D is best known as the vitamin that is produced when sunlight hits your skin. Scientists said people with IBS might benefit from taking vitamin D supplements

Vicky Grant, a researcher, has had IBS for more than 30 years.
She started taking a high-dose of vitamin D3 supplements five years ago – and has seen significant improvement with her symptoms.
Ms Grant said: ‘I read about other IBS patients experiencing success with vitamin D, via the online patient community.
‘I wasn’t really expecting the vitamin D supplements to work as I had tried and failed with so many other treatments.
‘I’m not cured but I have found that supplementation has dramatically improved my IBS.’
The study was published in the journal British Medical Journal Open Gastroenterology.