Consider starch and fiber, both polysaccharides, both derived from plants, both composed of hundreds to thousands of monosaccharides joined together, but they're joined together differently, and that changes the effect  they have on your body.
Amidonul și fibra, ambele polizaharide, ambele derivate din plante, ambele compuse din sute de mii de monozaharide legate, dar legate diferit, schimbă efectul pe care îl au asupra corpului.