Marshmallows (yes, even Wagon Wheels) contain: corn syrup, sugar, dextrose, food starch - modified (corn), water, gelatin, tetrasodium pyrophosphate artificial and natural flavor, and artificial color. Gelatin = boiling animal skin, connective tissue, hooves or bones. You'll find gelatin in jelly,jam, gummy candies, Jell-o, ice cream, margarine, cream cheese, low-fat, and margarine and many other foods also contain gelatin.

(Alternatives to gelatin include non-animal sources as agar-agar (a seaweed), carrageenan (Irish Moss), pectin (apples and citrus peel), konjak, and guar gum.