What You Eat Could Impact Your Memory

by Iswarya on  January 29, 2019 at 11:57 AM Diet & Nutrition News
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Higher levels of novel satiety hormone could reduce a person's likelihood of developing Alzheimer's disease, reports a new study. The findings of the study are published in the journal Neurobiology of Aging.
What You Eat Could Impact Your Memory
What You Eat Could Impact Your Memory

You may be familiar with the saying, "You are what you eat," but did you know the food you eat could impact your memory?

Using data from the Alzheimer's Disease Neuroimaging Initiative (ADNI), the researchers looked at the satiety hormone, Cholecystokinin (CCK), in 287 people. CCK is found in both the small intestines and the brain. In the small intestines, CCK allows for the absorption of fats and proteins. In the brain, CCK is located in the hippocampus, which is the memory-forming region of the brain, Willette said.

The researchers found for individuals who have higher CCK levels, their chance of having mild cognitive impairment, a precursor state to Alzheimer's disease, or Alzheimer's disease decreased by 65 percent. "It will hopefully help to shed further light on how satiety hormones in the blood and brain affect brain function," Willette said.

Why CCK?

Alexandra Plagman, lead author and graduate student in nutritional science, said they chose to focus on CCK because it is highly expressed in memory formation. The researchers wanted to see if there was any significance between levels of CCK and levels of memory and gray matter in the hippocampus and other important areas.

They also looked p-tau and tau proteins, which are thought to be toxic to the brain, to see how these might impact CCK and memory. They found that as tau levels increased, higher CCK was no longer related to less memory decline.

The researchers hope this study will encourage others to look into the nutritional aspect of diets, versus just looking at caloric intake. Plagman already is looking at how diet impacts an individual's CCK levels through researching fasting glucose and ketone bodies.

"By looking at the nutritional aspect, we can tell if a certain diet could prevent Alzheimer's disease or prevent progression of the disease," Plagman said.

"The regulation of when and how much we eat can have some association with how good our memory is," Willette added. "Bottom line: what we eat and what our body does with it affects our brain."

Source: Eurekalert

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