Lucky Charms cereal is soy free

Oats (Whole grain), Oats (flour), marshmallows (sugar, modified starch/modified corn starch, corn syrup, dextrose, gelatin, calcium carbonate, yellow 5 & yellow 6, blue 1, red 40), artificial flavor, sugar, corn syrup, corn starch, salt, calcium carbonate, food coloring/artificial color, trisodium phosphate, zinc, iron, vitamin C (sodium ascorbic), niacinamide (a B vitamin), vitamin B2 (riboflavin), vitamin B1 (thiamin monontrate), vitamin A (palmitate), folic acide, vitamin B12, vitamin D, vitamin E (mixed tocopherols)

source: http://en.wikipedia.org/wiki/Lucky_Charms