If You Care Compostable Trash Bags are made from potato starch from non-GMO starch potatoes blended with a certified, fully compostable polymer. No plasticizers are added. Starch is a mixture of a linear (amylose) and a branched (amylopectin) polymer of glucose. Potato starch has a higher percentage of amylopectin than either corn or wheat starch. Amylopectin gives starch its structural integrity, so it helps make If You Care Compostable Trash Bags stronger than bags made from corn starch. If You Care Compostable Trash Bags are completely polyethylene free and do not contain plasticizers. The potato starch used to make If You Care Compostable Trash Bags comes from starch potatoes, which are not grown as a food source but only for starch production. These potatoes are too high in starch to be good for food. Therefore, there is no diversion from food supplies. In addition, to produce the same amount of starch from these potatoes as from corn requires 40% less land.