Both Diet Coke and Coke Zero Sugar contain caffeine unless you opt for their caffeine-free versions. Diet Coke has 46 ...
and caffeine (though you can buy caffeine-free versions of both—look for the packaging with gold accents). Coke Zero has two ingredients Diet Coke lacks: potassium citrate and acesulfame ...
Review writer Isabella Johnson tried five different energy drinks; here's the best ones to fuel your study session based on ...