Fructose syrup is a sweetener obtained enzymatically from corn starch, named fructose syrup, is there is glucose, but also fructose. Fructose syrup according to the proportion of fructose contained, can be divided into fructose syrup No. 42 containing 42% fructose, fructose syrup No. 55 containing 55% fructose and fructose syrup No. 90 containing 90% fructose. Fructose syrups are sweeter, contain sugar and cannot be considered 0 sugar.

In food labeling, where the product is claimed to be "no or no sugar", the sugar content should be less than 0.5g/100g (solid) or 100mL (liquid).