Effect of probiotics on colorectal cancer in clinical trials

Interventions: Ten subjects receive probiotic product contained 10 million CFU in viable form 3 times a day for 6 months,Ten subjects receive probiotic product contained 10 million CFU in non viable form 3 times a day for 6 months, Ten subjects receive product without probiotic 3 times a day for 6 months;Active Comparator Dietary Supplement,Active Comparator Dietary Supplement,Placebo Comparator Dietary Supplement;probiotic products in viable form,probiotic products in non viable form,Control Primary outcome(s): reduceing of number of pathogens in gut at 6 months after intervention number of pathogens / Anova Study Design: Randomized