Just half a teaspoon of cinnamon a day significantly reduces blood sugar levels in diabetics, a new study has found. The effect, which can be produced even by soaking a cinnamon stick your tea, could also benefit millions of non-diabetics who have blood sugar problem but are unaware of it.

The discovery was initially made by accident, by Richard Anderson at the US Department of Agriculture's Human Nutrition Research Center in Beltsville, Maryland.

"We were looking at the effects of common foods on blood sugar," he told New Scientist. One was the American favourite, apple pie, which is usually spiced with cinnamon. "We expected it to be bad. But it helped," he says.