It is used in soups, meat. It is sold by itself under the brand name of Accent. When fruit ripens, the pectin in it breaks down and causes the fruit to become soft. Pectin is a gelling agent and is used to thicken barbecue sauce, frosting and yogurt. In candy, ice cream and beverages polysorbate 60 helps keep flavor oils dissolved.
Propionic acid is a source of nutrition and is among the safest of all food additives.
One common use is to prevent the growth of mold on baked goods. Other related additives that serve similar purposes are propylene glycol monostearate, glycerol and sorbitol. Casein is milk solids, the liquid left is called whey. The additive also helps prevent the bacteria that can cause botulism. Sodium nitrate stands as one of the most dangerous food additives and should be avoided whenever possible.