Not only that, but whey has been found to improve blood sugar regulation which is another factor in controlling appetite and metabolism. Instead, green tea contains high concentrations of catechin polyphenols, which work with other chemicals to intensify fat oxidation and thermogensis (in which heat is created in the body to burn fuels like fat). Moreover, green tea causes the release of carbohydrates to slow down and thus, prevents sharp increases of insulin in the blood. 1/2