This food package can tell when meat is spoiling by changing colour from purple-red to yellow-green before the damage is obvious

• Representative imageA packet of meat can look fresh on the supermarket shelf even while bacteria are already multiplying inside.
• By the time a spoiled smell, discolouration or slimy texture becomes obvious, indicating that the meat has gone stale, the food may no longer be safe to eat.
• To find a solution to this, researchers at Kyushu University in Japan are working on a packaging material that could give consumers an earlier warning.