Beverage Containing Mixed Green Banana Flours Promotes Healthier Stool Patterns in Adults with Overweight

Immature fruits may contain bioactive compounds and non-digestible dietary fiber, with potential to improve intestinal health. Mixed green banana pulp and peel flours is a good source of resistant starch, dietary fiber, and bioactive compounds. Our study evaluated the role of functional beverage addicting with mixed green banana flours (MF) on the intestinal markers in overweight adults. In this single-blind, randomized, placebo-controlled clinical trial involved 54 adults aged 20–50 years. Participants were assigned to a control group (CG, n = 27; placebo with waxy starch) or an intervention group (MFG, n = 27; MF beverage), both under caloric restriction (-250 kcal) for 12 weeks. Biological samples and the Bristol Stool Scale (BSS) was also used to analyze the stool consistency and form samples. After the intervention, both groups (CG and MFG) showed a decrease in fecal pH, but there were no differences between groups. At baseline and post-intervention, both groups presented a predominance of Bristol types 3 and 4, representing normal bowel function. However, this effect was more pronounced in the MFG group, where the frequency of type 4 increased from 13.0% at baseline to 69.60% post-intervention. At the same time, individuals who consumed MF beverage did not report abnormally hard (type 1 and 2), whereas they persisted in the CG (3.6% type 1 and 10.7% type 2 after the intervention). These results reinforce that the dietary intervention based on mixed flours contributed to a healthier distribution of stool types, with a clear predominance of normal stools and elimination of constipation profiles.