The researchers sequenced bacterial DNA from faecal samples taken from volunteers and discovered that those who were obese had a higher proportion of Firmicutes than lean people did.

• 研究人员从志愿者粪便样本中提取细菌的DNA，对其进行测序，而后发现肥胖人士体内壁厚菌门的微生物的比例比苗条人士要高。