You probably know someone who has watched a parent or grandparent lose their memory bit by bit. For many people over 40, that quiet worry sits in the background of every forgotten name. What you put on your plate may matter more than you think.
A new study in the Journal of Neurology, Neurosurgery & Psychiatry followed 1,647 middle-aged and older US adults for a median of 12.3 years. Those who ate closest to the MIND diet showed less brain shrinkage on repeated MRI scans.
Each 3-point jump on the diet's score was tied to roughly 20 percent less age-related loss of gray matter, the brain tissue that handles thinking and memory. The researchers describe that as the equivalent of about 2.5 years of slower brain aging over the follow-up period.
What the MIND diet actually looks like on a plate
The MIND diet is a hybrid of two well-known plans, the Mediterranean diet and the DASH diet, which stands for Dietary Approaches to Stop Hypertension. According to Harvard Health, the study scored people on how closely they followed a 15-point MIND eating pattern.
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Ten of those groups are the ones to lean into. They are leafy greens, other vegetables, berries, nuts, beans, whole grains, fish, poultry, olive oil, and, for people who drink, one glass of wine.
Five groups are the ones to limit. They are red meat, butter and stick margarine, cheese, pastries and sweets, and fried or fast food.
The foods that moved the needle most
When the researchers broke the diet down piece by piece, two foods stood out on the protective side. Higher berry intake was tied to slower growth of the lateral ventricles, the fluid-filled spaces inside the brain that get bigger as surrounding tissue shrinks.
Poultry showed a similar protective pattern on the ventricle measure. The authors note that antioxidants in berries and lean protein from poultry may help limit stress and damage to brain cells.
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On the other side, two kinds of food stood out as unhelpful. Sweets were linked to faster ventricle growth and more shrinkage of the hippocampus, the brain's memory center. Fried fast food was also tied to more hippocampal shrinkage.
What the study cannot say
This is an observational study. It tracks what people ate and what happened to their brain scans, but it cannot prove the diet caused the slower aging. The two simply moved together.
The participants came from the Framingham Heart Study, a long-running US cohort, and most were white. Diet was measured with food questionnaires, which rely on what people remember eating.
Brain scans tracked structure, not dementia diagnoses, so the study does not tell us how many people later developed memory disease.
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Anyone with ongoing memory concerns or a strong family history of dementia should talk to their own doctor before making major changes to diet or lifestyle.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.