The difference between the old and new formulation of Phoenix is the new version of Phoenix significantly increases energy expenditure, is better at reducing hunger and cravings, and better supports mood and cognition while dieting. It accomplishes this without any stimulants (the older formula contained a mild stimulant called synephrine). We also removed epigallocatechin gallate (EGCG) from the formula because it can cause stomach upset in some people when taken on an empty stomach.