The Focus Journal
Plain-English articles on caffeine, L-theanine, focus and energy — every claim referenced to the source.
B Vitamins and Energy: What B6 and B12 Actually Do
B6 and B12 are on a lot of energy labels — but they do not work like caffeine. Here is what the science, and the EFSA-authorise...
How Much Caffeine Per Day Is Safe? The Numbers, Explained
European and US food-safety bodies broadly agree on daily caffeine guidance for healthy adults. Here are the actual numbers, wh...
Caffeine and Exercise: What the Sports Science Actually Shows
Caffeine is one of the most researched performance aids in sports science. Here is what the International Society of Sports Nut...
How Fast Does Caffeine Gum Work? What the Research Says
Caffeine gum is absorbed through the lining of the mouth, which peer-reviewed research shows can deliver caffeine measurably fa...
Caffeine + L-Theanine: The Science Behind Calm, Focused Energy
Why is caffeine so often paired with L-theanine? A tour of the randomized trials behind the most studied focus combination in n...
The Complete Guide to Caffeine Gum: How It Works, What's In It, and How It Compares
Everything you need to know about caffeine gum: how buccal absorption works, what a clean formula looks like, sensible dosing, ...