IMPROVING healthy gut bacteria by consuming foods rich in so-called prebiotic compounds could reduce the incidence of exercise-induced asthma, according to scientists from Nottingham Trent University, who have published findings in the British Journal of Nutrition.
Prebiotics: led to improvements in exercise-induced asthma in testing
Prebiotics have been shown in previous trials to promote the growth of beneficial gut bacteria, helping to maintain a healthy digestive system. They are found in foods including oats, bananas, onions and Jerusalem artichokes. However, for their recent double-blind, placebo-controlled trial, Dr Neil Williams and his colleagues at the department of sport science and the Sport, Health and Performance Enhancement (SHAPE) research centre tested a prebiotic supplement called Bimuno-galactooligosaccharide (B-GOS) for its effects on asthma severity.
Subjects were given the prebiotic supplement for three weeks, followed by a two-week washout period when they took no treatment. They then took a placebo for a further three weeks.
They also underwent a hyperventilation test – which induces the symptoms of exercise-induced asthma – as well as tests of pulmonary function.
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