Probiotic Drinks ????
One in two probiotic health drinks do not have the healthy bacteria claimed on the label, microbiologists warned yesterday. But up to 25 products - many of them sold over the web - do not contain the right bacteria, or contain it in too small quantities.
Shoppers should be suspicious unless the probiotic drinks and capsules state that they have lactobacilli or bifidobacterium, and stipulate a minimum of 10 million bacteria per bottle.
The warning was made by Glenn Gibson, professor of food microbiology at the University of Reading, together with Dr Sandra McFarlane, a microbiologist at Dundee University, and Professor Christine Edwards, head of human nutrition at Glasgow University.
So-called healthy bacteria account for 10-15% of the bacteria in the gut in adults, but become depleted either through a poor diet - such as too much fatty, low fibre, preservative-laden food - or through environmental factors, use of antibiotics, and stress.
Probiotic products seek to redress the balance, and consumers are increasingly buying into the idea of replenishing their supplies of "healthy bacteria", with the UK market for probiotic yoghurt drinks and yoghurts being worth £307m in the year up to July.
Research published by the Food Standards Agency last year indicated that some probiotics do reach the gut, but found that, out of 35 bacterial strains in 12 commercial products, only lactobacillus was sufficiently robust to survive the whole digestive process.
Yesterday, Prof Gibson, who led the research, warned that half of the 50 products available in the UK had the "wrong" bacteria and were of no benefit.
"Half the products on sale don't contain the bacteria they say on the label. Even the large companies using the right bacteria only list the level of bacteria going into the product, not the level when you finally consume it.
"On the other hand, there are a lot of manufacturers - many of which sell products on the web - who are unheard of, and these are the ones to worry about. Half of the products you can buy have got the wrong bacteria in them, the wrong amount, or are completely sterile.
"There's no legislation to protect you against this at present," he added.
He cited one dried powder product, now discontinued, found to contain raised levels of clostridium, a bacteria which causes diarrhoea and colitis.
He added: "The key thing is getting enough of these bacteria. They need to be the right strain: look for lactobactilli or bifida bacteria. And there need to be a minimum of 10 million per bottle".
The scientists also advised that anyone aged over 65 should take the products. Past this age, the number of healthy bacteria decrease by a thousand to around just 2% of the gut's natural flora.
Anyone taking antibiotics should also take a probiotic, as should people going into hospital - in the hope it might help ward against hospital-acquired infections such as MRSA or clostridium difficile.
Prof Edwards said the ideal would be for people to look at their entire diet, but with only 8% of Britons eating a healthy diet, functional foods such as probiotics
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