The goal of this clinical trial is to learn the effect of Bifidobacterium animalis subsp. lactis Bi66 supplementation on gut function in healthy adults. The main questions it aims to answer are: 1. Does Bi66 affect the gut function(bowel movement frequency and stool form)? 2. Does Bi66 affect the gut microbiota and short-chain fatty acids ? Researchers will compare probiotic Bi66 to a placebo (a look-alike substance that contains no Bi66) to see if Bi66 works to affect gut function. Participants will 1. Take Bi66 or a placebo every day for 8 months 2. Return the used sachets and stool diaries every 7 days and record bowel movement frequency per week and Bristol Stool Scale 3. Have checkups, including questionnaire survey, physical measurement, dietary survey, collection and detection of biological samples at baseline, week 4, week 8
Age range
18 Years – 65 Years
Sex
ALL
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Bowel movement frequency
Timeframe: From enrollment to the end of supplementation at 8 weeks
gut microbiota
Timeframe: Baseline, 4 weeks, 8 weeks