Dextro Energy has been a popular product for generations. Dextro Energy cubes were first marketed in 1935 – then as now, with each cube made up of individually packaged smaller tablets. Nowadays Dextro Energy is offered in various product forms geared to the user’s individual needs and situation as well as personal flavor preferences. With their handy format, they fit into even the smallest pocket. That puts glucose (also known as dextrose) within easy reach, so it can travel directly to the brain and muscles right away.