Researchers in China have identified what they believe is a gut bacterium which causes obesity. Financial Times reports that they decided to treat the condition with "whole grains, traditional Chinese medicines and non-digestible carbohydrates" and caused an obese patient to lose 23 percent of his body weight.
I'm unclear why some or all antibiotics wouldn't cause weight loss if the cause of weight gain is a gut bacterium. I believe this research needs more investigation, unfortunately.
