Sex and chocolate can boost brain

Enjoy dark chocolate, have plenty of sex, eat cold meats and fish for breakfast and you could boost your brain power, say the authors of a new book.

Cognitive psychologist Terry Horne and biochemist Simon Wootton - who co-authored Teach Yourself: Training Your Brain - argue that lifestyle choices are crucial for keeping you in tip-top mental condition.

"Lifestyle can boost your brain power," Horne said. "What your lifestyle does is help to create the chemical conditions in your brain."