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

Are sausages bad for you?

Felicity Cloake: New research says that people who eat processed meat have an increased risk of an early death. Does this mean we have to give up sausages – or will we be OK if we buy posh bangers and grill rather than fry them?