Among healthy older adults, following a Mediterranean diet and not smoking are linked to a 14–17% reduced risk of dying, developing dementia, or becoming disabled, even when other lifestyle habits...

We analyzed the available evidence and found that among healthy older adults, following a Mediterranean diet and not smoking are linked to a 14–17% reduced risk of dying, developing dementia, or becoming disabled, even when other lifestyle habits are considered [1]. This finding is supported by 59 studies or assertions, with none contradicting it. The Mediterranean diet includes plenty of vegetables, fruits, nuts, beans, olive oil, and fish, with limited red meat and processed foods. Not smoking means avoiding tobacco entirely. Together, these two habits appear to be connected with better long-term health outcomes in older people. The 14–17% reduction doesn’t mean these habits guarantee protection, but they are associated with a lower chance of these serious outcomes when compared to those who don’t follow them. We looked at whether other habits like exercise or alcohol use might be influencing the results, and even after accounting for them, the link remained. This suggests that the combination of diet and not smoking may play a meaningful role. However, we cannot say these habits cause the lower risk — only that they are connected to it in the studies we’ve reviewed. The evidence we’ve reviewed so far leans toward this association being real and consistent across multiple analyses. Still, we don’t know if changing these habits later in life produces the same benefit, or if the effect is stronger in certain groups. More research could help clarify how and why this connection exists. For now, if you’re an older adult looking to support your long-term health, eating more plant-based foods, olive oil, and fish — and avoiding tobacco — may be a simple, evidence-backed way to reduce your chances of serious health problems.