Probiotics research published

March 23, 2005

March 21, 2005

Food Standards Agency

Research to find out whether bacteria from probiotic products survive in

people’s digestive systems has been published today by the Agency.

The study was designed to find out if and where these bacteria break down as

they pass through the digestive system. The study did not look at whether

probiotic products have an effect on health.

Findings suggests that not all strains of bacteria used in probiotic products

survive through the entire digestive system, although at least one strain in

each of the products tested survived beyond the stomach. The research does not

show if or where probiotics might have an effect.

Scientists at the University of Reading used laboratory models of the human gut

to imitate the conditions of the stomach, upper intestine and lower intestine.

Probiotic bacteria found in 11 different probiotic products were tested.

Products included dairy and fruit juice containing live bacteria and dry

preparations in the form of tablets, capsules and powder. All bacteria used were

grown and their numbers standardised before each experiment began.

The researchers used a model to simulate the effect adding probiotic bacteria

would have on the total number of bacteria in a typical human digestive system.

Overall, adding bacteria from probiotics did not change the total number of

bacteria in the gut.

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