The main ingredients are fructose and glucose, of which the fructose content is 42% (dry base), so it is called F42 fructose syrup. F42 fructose syrup is the result of rearrangement change in the molecular structure of some glucose under the action of isomerase, and then concentrated after decolorization, ion exchange and other refined treatments. F42 fructose is 0.9 – 1.0 times sweeter than sucrose. Compared with sucrose, it is sweet and moist, sweeter at low temperature, osmotic pressure is twice higher than that of sucrose, moisture absorption and moisturizing performance is better than sucrose, metabolism does not need insulin assistance, and the amount of liver glucose produced by fructose metabolism in the body is 3 times that of glucose, which has the effect of liver protection. Fructose has a strong bonding ability with cells in the body, which can play a stable and gradual release of energy, and is most suitable for the production of sports drinks.