The new study randomized 1,298 participants to ask for help with medical scenarios from large language models (LLM) or a source of their choice, such as Google. The group using LLM identified the relevant differential diagnosis only 34.5% of the time, which was worse than the control group. LLM's errors included advising participants from the UK to call triple zero (the Australian emergency number) and suggesting lying in a dark room if subarachnoid haemorrhage was suspected. A prospective cohort study analyzed data from 131,821 participants with a median follow-up. Research shows that up to 45 percent of dementia cases could be prevented by lifestyle and environmental changes, including addressing 14 modifiable risk factors such as physical inactivity, smoking and social isolation. The ACTIVE study of more than 2,800 older adults demonstrated that speed training for less than 24 hours over three years reduced the incidence of dementia by 25 percent compared to a control group.[1][2][3]