Pectins

Pectins are soluble non‑digestible polysaccharide abundant in fruits and some vegetables, classified within plant cell‑wall non‑digestible carbohydrates

We classified pectins as an intermediate-specificity dietary fiber .
Cantu-Jungles et al. 2021 mBio 12:e01028-21

Pectin is not classified as a FODMAP
Singh et al. 2019a Gut 68(10): 1801-12

Pectin is a structural acidic heteropolysaccharide contained in the primary and middle lamella and cell walls of terrestrial plants. Its main component is galacturonic acid, a sugar acid derived from galactose. The pectin backbone comprises 3 types of polymer: homogalacturonan (HGA), rhamnogalacturonan I (RGI), Rhamnogalacturonan (RGII). They can harbor a high chemical complexity, comprising up to 17 different sugar units and containing more than 20 different linkages
Voragen et al. 2009 Struct Chem 20: 263-275

On the other hand, pectins are soluble in water, which allows easy access of most gut microbes, and are present in the majority of plant food sources common in diets
Voragen et al. 2009 Struct Chem 20: 263-275

The most popular pectins as prebiotics are apple pectin, citrus pectin, and orange pulp fiber pectin