Umami: why the fifth taste is so important

Amy Fleming's tasting notes: The strong savoury flavour that makes everything from spag bol to Marmite so hard to resist may serve a vital evolutionary purpose. We could even use it to fight malnutrition. Pass the parmesan

Is drinking tea bad for you?

Recent reports suggest that tea can cause brittle bones – but you'll probably be safe if you drink less than a gallon a day