Nothing "special" in the ingredients. It's low calorie if you eat a small portion, but with little fiber or protein and HFCS, I'd be hungrier shortly after eating it than I was prior.
http://www.calorie-count.com/calories/item/71331.html
Special K Ingredients:
Rice, wheat gluten, sugar, defatted wheat germ, salt, high fructose corn syrup, dried whey, malt flavoring, calcium caseinate, ascorbic acid (vitamin C), alpha tocopherol acetate (vitamin E), reduced iron, niacinamide, pyridoxine hydrochloride (vitamin B6), riboflavin (vitamin B2), thiamin hydrochloride (vitamin B1), vitamin A palmitate, folic acid, and vitamin B12.