The analysis, published in the Cochrane Library, stated that further research was needed to show an association between the consumption of prebiotics and allergy reduction, however, "individual studies reported a significant reduction in asthma and eczema from supplementation with a mixture of
galacto- and fructo-oligosaccharide ...
As an alternative, some forms of complex oligosaccharides including mannan-,
galacto-, and fructo-oligosaccharides, which recently have been used as prebiotics in monogastric feeding regimens (Shafey et al., 2001; Yang et al., 2007), may also be examined in ruminant diets to test whether or not these compounds act as agents that selectively attach to bacteria and may thus ultimately modify ruminal metabolism.