I can't remember if the last piece of research said that coffee was good or bad, but it's definitely back on the good list again. While it sounds rather strange, this time they're telling us that coffee helps prevent tooth decay. It's not the caffeine, but the chlorogenic acid, nicotinic acid and trigonelline (don't they sound appetising?) that stop Streptococcus mutans from sticking to teeth. So even decaf drinkers should have sparkly choppers.

Okay, so perhaps the tests we're performed on actual teeth. They used “a synthetic tooth surface”. Oh, and they didn't use coffee. They only applied the chlorogenic acid, nicotinic acid and trigonelline.

I don't think I'll stop brushing my teeth just yet, but maybe I'll go have another espresso.