probiotic pro or con

what is probiotic ?  Have had colon surgery had 26 in. removed am having trouble with bowel movements. i do all the fiber required still no help was told to like in to probiotic. where can i find it?

[Sandra Y, RPh]

Probiotics are bacteria that help maintain the natural balance of organisms (microflora) in the intestines. The normal human digestive tract contains about 400 types of probiotic bacteria that reduce the growth of harmful bacteria and promote a healthy digestive system. The most common probiotic bacteria in the intestine is lactic acid bacteria (Lactobacillus acidophilus), and is found naturally in yogurt

Probiotics are also available as dietary supplements. You can go to www.drugstore.com and type probiotic in the search bar to find the various ones available.