Your brain is not done yet
Three separate studies arrived this week at the same basic finding: there is no age at which the body simply stops responding to effort. A three-year University of Texas at Dallas study tracked 3,966 adults from 19 to 94 who spent five to fifteen minutes a day on brain training activities [3].
Even participants in their 80s showed measurable improvements across thinking clarity, emotional balance, and sense of purpose. A Kyoto University team followed the same group from a 2020 study four years later and found that adults in their early 70s who kept practicing a musical instrument maintained their verbal memory and showed significantly less shrinkage in the brain's putamen compared to those who stopped [4]. Stopping the practice reversed the benefit. Continuing it preserved it. And in a randomized trial of 120 adults aged 66 to 89, three tablespoons of peanut butter daily for six months improved sit-to-stand performance, a direct measure of lower-body muscle power and fall risk, without any weight gain [52]. A second arm of that study found that peanut and peanut butter consumption improved memory scores and reduced stress in younger adults over the same period.
Your brain can keep improving into your 90s, study finds
The UT Dallas team used the BrainHealth Index, a 20-metric assessment covering sleep quality, happiness, and complex thinking [3]. "Every brain is as unique as a fingerprint and has potential for growth," said Lori Cook, the study's corresponding author. The finding that challenges assumptions most directly: gains appeared in participants in their 80s and 90s, ages at which the prevailing assumption has long been one of inevitable, progressive loss.
Read the storyLearning a musical instrument in your 70s could help protect memory
The Kyoto study is more precise than most, because it tracked the same group of people across four years rather than comparing different people at a snapshot in time [4]. The right putamen, a brain region involved in memory and motor learning, was measurably larger in those who kept playing. Those who stopped lost both the brain volume advantage and the verbal memory scores they had gained. The implication: continuing mattered more than having started.
Read the storyNew Peanut Butter Study Finds Benefits For Muscle And Brain Health
The peanut butter study surprised researchers on two counts: the benefit appeared without any change to exercise habits, and it did not cause weight gain despite increasing daily calorie intake [52]. Researchers think the amino acid arginine may improve blood flow to muscles, though they note that remains a hypothesis. The memory and mood improvement in younger adults was an unexpected secondary finding.
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