Most of those studies are short term. Most of the stuff, this enriched environment kind of work that you do with them when they're young, everybody's back to the same. So you can't just look at what happens the first few months and move on. Here's some things if you want to help preserve cognitive intelligence as people age. The absence of cardiovascular and other chronic diseases,. A favorable environment above average education, occupational pursuits, pursuits involving high complexity and low routine above average income., maintenance of intact families.