Sugars and Starches Sugars and Starches Cane sugar, maple syrup and beet sugar as well as many of the sugar substitutes used by dieters are extracted from plants.
Potatoes are one of our major sources of starch.
The other major source of starch is cereals like rice, maize and wheat, from which we make maize meal, bread, cakes and biscuits. Many pet foods also contain substantial amounts of cereals.