If you’re dithering over whether to have that extra coffee, you now have an excuse to go ahead.
Having three or more cups a day is linked with a lower risk of dementia, according to one of the largest studies on the subject so far.
A similar effect is seen from drinking tea – and it is the caffeine in these drinks that seems to be the explanation, rather than any other substance in coffee and tea plants.
Shorts
Caffeine, probably the most common mind-altering substance consumed worldwide, has an obvious short-term impact, making us feel more alert and less sleepy. But there have long been questions about whether it has any longer-lasting effects.
