Disclaimer: This is a sponsored Post! Focus Supplements were kind enough to give me their Caffeine and L-Theanine capsules as well as the D Mannose for testing! There are negative side effects of caffeine… by itself. Don't believe me? Well, then keep on reading! The combination of caffeine and L-Theanine is considered by many to be the best place for a beginner to … [Read more...] about A Caffeine and L-Theanine Test And Review!