EnergySource 4:1 was tested in Cycling Plus Magazine.

EnergySource 4:1 was tested in the January 2006 issue alongside a number of leading energy drink companies. The verdict was:

" The drink is easy to prepare. During high intensity exercise energysource 4:1 really come into its own. The energy giving effects are almost instantly, allowing you to work longer, harder without feeling tired. Its is also fresh tasting and doesn't leave an unpleasant taste." 8/10