Glucose-Fructose syrup is generally known as corn syrup outside the US and Canada. Glucose syrup containing more than five per cent fructose can be labeled 'glucose-fructose syrup' or 'fructose glucose syrup' depending on the proportions of glucose and fructose in the product. Glucose-fructose syrup has more glucose than fructose, where most High Fructose Corn Syrup is 55% fructose. It is usually manufactured in the same way as HFCS, by taking glucose syrup (aka corn syrup) and processing it to convert some of the glucose into fructose. There are other ways of making it but this one is common because it's cheap. Theoretically this syrup could contain up to 50 per cent fructose, making it high fructose corn syrup.