Brain activity

Young adults who ate a handful of walnuts with breakfast saw a long-lasting improvement in their reaction times and a boost in memory hours later, according to a new study. The findings strengthen the claim that walnuts are a brain-enhancing food.

Researchers found that when groups of people watch the same health promotion videos, their brain activity syncs up, indicating that the message has gone beyond being seen and heard. This approach could lead to more effective health campaigns.