Prebiotic Types

Inulin is a fructan-type prebiotic found naturally in several plant foods and is documented to stimulate Bifidobacterium growth. Polyphenols are classified as prebiotics because they support commensal bacteria and also provide anti-inflammatory and antioxidant benefits. FOS at about 4–15 grams has been shown to improve constipation by increasing stool frequency and quality. Inulin-rich vegetables increased Bifidobacterium levels 3.8-fold over two weeks in one study described by the article. Resistant starch reaches the colon mostly unchanged and is fermented into SCFAs and other metabolites. GOS are found mainly in dairy products and legumes and increase Bifidobacterium levels.