This randomized, placebo-controlled clinical trial will be conduct for 8 weeks with three hundred adults. Subjects will be recruited and randomly assigned into three groups: (1) placebo, n = 100; (2) immature ponkan extract, n=100; (3) immature ponkan extract with time restricted feeding, n=100. During the 8 weeks intervention, the subjects should take 25mL liquid of placebo or immature ponkan extract a day (drink 25mL for once, and once a day). The two drinks are supplied in aluminum foil packages, and both the products taste the same. Subjects also should complete the assessment of anthropometric measurement, intestinal questionnaire , food record, feces and blood collection at week 0, 4 and week 8.
The aim of this study is to investigate the effects of immature ponkan (Citrus reticulate) extract on body weight and body fat in overweight and obese adults.