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.
Considerem el midó i la fibra, tots dos polisacàrids, tots dos derivats de les plantes, tots dos formats per centenars de milers de monosacàrids encadenats, però encadents de manera diferent, i això canvia l'efecte que tenen en el nostre cos.