Gaming addicts with sore eyes and tired brains may be able to perk up with "Game Suppli", a new Japanese supplement developed specifically for the country's thousands of fanatic players. Maker Kyowa-Yakuhin produces two different supplements for the "Game Suppli" range: blueberry tablets that are meant to be good for the eyes, and transparent capsules containing Docosahexaenoic acid, or DHA, a fatty acid that supposedly enhances concentration. Japan's convenience stores are stacked with drinks and capsules claiming various health and beauty benefits, sometimes without any scientific evidence.