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The research didn’t control for ease of consumption; frozen vegetables are not easy to eat compared to a bag of potato chips or a candy bar. “Fruits and vegetables – frozen vegetables and orange juice, since fresh produce prices were not attainable.” Duh! Why not? An apple or a banana is nearly as easy to consume as junk food. Additionally, orange juice is almost junk food since it is full of sugar, even added sugar in some brands.
Also, what about availability? A small grocery store is going to stock what their market demands. If people don’t ask for fresh fruit, yogurt or other more nutritious snack food, it won’t be on the shelves.
“Over 10 years of follow-up, the rate of decline for those who ate the most leafy greens was slower by 0.05 standardized units per year than the rate for those who ate the least leafy greens. This difference was equivalent to being 11 years younger in age, according to Morris.”
Do we know how the 0.05 standardized units to 11 year conversion is calculated?
If you understand statistics, here is the author’s statistical analysis on the full text page:
She does point out that “The study results do not prove that eating green, leafy vegetables slows brain aging, but it does show an association,” Morris said. “The study cannot rule out other possible reasons for the link.”
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