Excessive reliance on AI tools like ChatGPT, Claude, and Gemini may harm brain health by reducing cognitive exercise, potentially increasing the risk of dementia, experts warn.

It's fair to say the AI revolution is well and truly under way in homes, schools, universities and businesses across the UK.

One American-British study of 1,222 people, still under peer review, found that using AI tools to solve arithmetic or reading comprehension exercises improved participants'…