High maltose corn syrup is a food additive designed to sweeten the taste of food and increase its shelf life.The majority sugar is maltose, it contains 40–50% maltose, though some have as high as 70%. High-maltose glucose syrup is used as a substitute for normal glucose syrup in the production of hard candy. Maltose is also less humectant than glucose, so the candy produced with high-maltose syrup will not become sticky as easily as candy produced with a standard glucose syrup.