The health claims are hard to test , says gordon , because there is so much variety in the bacteria in the yoghurts and in the people who consume them , but gnotobiotic mouse models will be vital for such studies .

戈登称，这些健康作用很难被证实，因为酸奶中添加的细菌种类繁多，且购买者体内菌种各异，而小鼠模型对此类研究至关重要。