Sample size of one here, but no amount of additional exercise or any other dietary change has ever helped my weight or overall energy level as switching from Co

Sample size of one here, but no amount of additional exercise or any other dietary change has ever helped my weight or overall energy level as switching from Coke to Diet Coke many years ago. The effect was nearly instant, dramatic, and permanent. Probably like many things, there are just too many variables to say A is good and B is bad.