Everybody says that Spain’s life expectancy is higher than that of the US. The explanation is usually the food, and yes, the food is of a much higher quality. But there is another factor.
I’m walking everywhere in Spain. From the campus of the Complutense, I walked to the Almudena Cathedral. From there, I’ll walk back to Tetuán. Those who know Madrid will confirm that this is a fair amount of walking. Everywhere I go, I see elderly people walking. And I mean very elderly. Alone, in pairs, in groups. I’ve never in my life seen so many very old people walking. Many walk very slowly or use canes. But they walk outside. Fresh air, exercise, direct sunshine, new impressions. You need to stay sharp to avoid other pedestrians and traffic. This has got to have an effect on health and mental acuity.
But yes, the victuals are high quality. Here’s the traditional hake in green sauce.

The vegetable on top is some sort of squash. Low in carbs, light, delicious.
I don’t like Spanish cuisine and prefer that they serve fish that has been fussed with as little as possible.