News Video | Policy | GPs | Hospitals | Medical | Mental Health | Welfare | Search

 


Vitamin D supplements not needed by healthy adults

Vitamin D supplements not needed by healthy adults

The widespread use of vitamin D supplements to prevent osteoporosis in healthy adults is not necessary, according to a study by one of New Zealand’s leading medical scientists.
 
The study, led by Professor Ian Reid from the University of Auckland’s Bone Research Group, found that taking vitamin D supplements does not improve bone mineral density in adults with a normal Vitamin D level. 
 
Professor Reid and his colleagues conducted a systematic review and meta-data analysis of the effects of vitamin D supplements on bone mineral density.  The data from more than 4000 healthy adults in 23 randomised trials was analysed and the results published this week in leading medical journal, The Lancet.
 
The study found that taking vitamin D supplements did not improve bone mineral density at the hip, spine, forearm, or in the body as a whole.
 
“Most healthy adults do not need vitamin D supplements” says Professor Reid. “Our data suggest that the targeting of low-dose vitamin D supplements only to individuals who are likely to be deficient could free up substantial resources that could be better used elsewhere in healthcare.”
 
“This systematic review provides very little evidence of an overall benefit of vitamin D supplementation on bone density. Continuing widespread use of vitamin D for osteoporosis prevention in community-dwelling adults without specific risk factors for vitamin D deficiency seems inappropriate,” says Professor Reid in the Lancet article.
 
Analysis of the data from the 23 studies did not identify any effects for people who took vitamin D for an average period of two years, apart from a small but statistically significant increase in bone density (0.8%) at the femoral neck. According to the authors, such a localised effect is unlikely to be clinically significant.
 
“In North America and Europe particularly, more than half the adult population have their vitamin D level assessed and take vitamin D supplements,” says Professor Reid.  “Some advocates have suggested that the indicator level for needing vitamin D supplements has been quite high.”
 
“We believe that vitamin D supplements are only indicated for people with very low levels, (such as those who are frail, are confined rest-home residents, or women who are veiled, and some dark skinned people),” he says.  “This review study suggests that the high use of vitamin D supplements by most healthy adults is a waste of money and resources.”
 
Others at risk of vitamin D deficiencies, such as children without access to a conventional diet, especially dark-skinned children, may need vitamin D supplements to avoid conditions such as rickets that affects the growing skeleton causing bowed legs and knock knees.
 
“Most healthy adults, especially in New Zealand, who live a normal, active life and get out regularly for activities such as walking, shopping and gardening, get vitamin D from the sun, and do not need vitamin D supplements”, says Professor Reid. 
 
“We do know that maintaining good blood vitamin D levels is important for promoting absorption of calcium from the diet,” he says. “Very high levels of Vitamin D may have the opposite effect, and take calcium out of the bone and weaken the skeleton.  There is a sweet spot in the middle, where not too much and not too little is a good level.”

ENDS

© Scoop Media

 
 
 
 
 
Culture Headlines | Health Headlines | Education Headlines

 
Scoop Review Of Books: Q&A: Prue Hyman On ‘Hopes Dashed?’

For Scoop Review of Books, Alison McCulloch interviewed Prue Hyman about her new book, part of the BWB Texts series, Hopes Dashed? The Economics of Gender Inequality More>>

Gordon Campbell: On Chuck Berry (And James Comey, And Bill English)

Back when many people were still treating rock’n’roll as a passing fad – was calypso going to be the new thing? – Chuck Berry knew that it had changed popular music forever. What is even more astonishing is that this 30-ish black r&b musician from a middle class family in St Louis could manage to recreate the world of white teenagers, at a time when the very notion of a “teenager” had just been invented. More>>

Howard Davis Review:
The Baroque Fusion Of L'arpeggiata

Named after a toccata by German composer Girolamo Kapsberger, L'Arpeggiata produces its unmistakable sonority mainly from the resonance of plucked strings, creating a tightly-woven acoustic texture that is both idiosyncratic and immediately identifiable. Director Christina Pluhar engenders this distinctive tonality associated with the ensemble she founded in 2000 by inviting musicians and vocalists from around the world to collaborate on specific projects illuminated by her musicological research. More>>

African Masks And Sculpture: Attic Discovery On Display At Expressions Whirinaki

Ranging from masks studded with nails and shards of glass to statues laden with magical metal, the works are from ethnic groups in nine countries ranging from Ivory Coast to the Democratic Republic of the Congo. More>>

Obituary: Andrew Little Remembers Murray Ball

“Murray mined a rich vein of New Zealand popular culture and exported it to the world. Wal and Dog and all the other Kiwi characters he crafted through Footrot Flats were hugely popular here and in Australia, Europe and North America." More>>

ALSO:

Organised Choas: NZ Fringe Festival 2017 Awards

Three more weeks of organised chaos have come to an end with the Wellington NZ Fringe Arts Festival Awards Ceremony as a chance to celebrate all our Fringe artists for their talent, ingenuity, and chutzpah! More>>

ALSO:

Wellington.Scoop: Wellington Writer Wins $US165,000 Literature Prize

Victoria University of Wellington staff member and alumna Ashleigh Young has won a prestigious Windham-Campbell Literature Prize worth USD$165,000 for her book of essays Can You Tolerate This? More>>

ALSO:

Scoop Review Of Books: We’re All Lab Rats

A couple of years ago, there were reports that Silicon Valley executives were sending their children to tech-free schools. It was a story that dripped of irony: geeks in the heart of techno-utopia rejecting their ideology when it came to their own kids. But the story didn’t catch on, and an awkward question lingered. Why were the engineers of the future desperate to part their gadgets from their children? More>>

  • CensusAtSchool - Most kids have no screen-time limits
  • Netsafe - Half of NZ high school students unsupervised online
  • Get More From Scoop

     
     

    LATEST HEADLINES

     
     
     
     
    Health
    Search Scoop  
     
     
    Powered by Vodafone
    NZ independent news