The table for your brain

In 2015 a nutritional epidemiologist at Rush University in Chicago named Martha Clare Morris published a diet designed for a single organ. She'd spent years following older adults in Chicago, tracking what they ate and how their minds aged, and she took the two best-studied patterns, Mediterranean and DASH, and kept only the parts that showed up again and again in the people whose thinking stayed sharp. She called it the MIND diet.

Its rules are specific in a way most diets aren't. Leafy greens, six servings a week, at least. Other vegetables daily. Berries, twice a week; specifically berries, not other fruit, because the evidence for them on the brain was strongest. Nuts most days. Beans several times a week. Whole grains daily. Fish once a week. Poultry twice. Olive oil as the main fat. Wine, one glass. And limits on the five things that hurt: butter, cheese, red meat, fried food, and sweets.

Her first study found that people who followed it closely had a substantially lower rate of Alzheimer's over several years, and that even moderate adherence helped. A larger randomized trial that followed found smaller effects, which is honest science doing its work. The pattern still stands as the best available guess at how to feed a brain.

It opens the second stretch of table keys because the Meaning chamber is about the mind, and the mind runs on what you eat. Six servings of greens a week isn't a diet. It's a habit, kept for decades, that keeps the organ you make meaning with.