Eating more plants may help you stay strong and avoid frailty as you age

Want to stay strong, steady and independent as you get older? What you put on your plate today can help. Older adults who ate a diet rich in vegetables, fruits, whole grains, beans and nuts were much less likely to become frail, and vegetables and fruits showed the strongest benefit.

Frailty is the loss of strength and energy that makes falls, hospital stays and trouble with daily tasks more likely. The good news is that this study points to something ordinary and doable: more plants at the table.

How the study worked

Researchers followed two groups of older adults living at home in Spain. One group had 3,289 people aged 60 or older, tracked from 2008 to 2015. The other had 3,273 people aged 65 or older, tracked from 2015 to 2023. Each person’s eating habits were scored on the Planetary Health Diet Index, a 0 to 140 scale across 15 food groups. This diet is mostly plants, with smaller amounts of meat and dairy. Frailty was checked repeatedly over the years, and the work was published Oct. 6, 2026, in the Journals of Gerontology. It was an observational study, so it shows a link and not proof of cause, and diet was measured once at the start.

What they found

People who followed the diet most closely were about half as likely to be frail as those who followed it least. In the two groups combined, the figure was 0.52, which is about half the odds.

The result held up in both groups separately. In the first group, the figure was 0.62. In the second, the odds were about 60% lower (0.40).

Frailty was measured with five signs: feeling worn out, low physical activity, slow walking, weak grip and unplanned weight loss. Frailty meant having three or more. The diet was linked most clearly to staying physically active. Of all the food groups, vegetables and fruits showed the strongest independent link.

What is the Planetary Health Diet?

It is a way of eating built to be good for people and for the planet. Most of your plate is vegetables, fruits, whole grains, beans and nuts. Meat and dairy are still there, just in smaller amounts. You do not need to follow it perfectly. The study looked at how closely people followed it, and more was better.

What you can do today

Add one extra serving of vegetables or fruit to lunch and to dinner. A side salad, a handful of frozen broccoli, a bowl of vegetable soup or a sliced apple all count. Frozen and canned options from your grocery store work fine and keep the cost down. Keep up your usual protein, such as beans, fish, eggs or dairy, so your muscles get what they need.