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New Study Explores How Food Choices Shape Mental Health

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New Study Explores How Food Choices Shape Mental Health

Authored by Jennifer Sweenie via The Epoch Times (emphasis ours),

A study out of the University of Reading has found that a poor-quality diet may be associated with changes in the brain structure that are linked to depression and anxiety. This research provides new insights into the connection between what we eat and our mental well-being.

While the authors did not find a direct association between brain changes and anxiety or depression, they did see an increase in rumination, a common risk factor of the two.


Billion Photos/Shutterstock
What the Study Found

The study is the first to examine the relationship between diet quality and brain neurochemistry in humans. Thirty adults were divided into two groups based on whether they followed a high- or low-quality diet. Participants in both groups were similar in age, gender, education, income, and caloric and macronutrient intake.

The quality of the diet was defined by adherence to the Mediterranean diet. Participants reported how frequently they ate 130 different food items, their consumption frequency, and food intake habits. Screening questionnaires were administered to assess current depression, anxiety, and rumination levels. Whole brain MRI scans measured prefrontal cortex metabolite concentrations and gray matter volume.

The study found that participants in the low-quality diet group had lower levels of GABA, higher levels of glutamate, and reduced gray matter volume in the brain—markers commonly seen in depression and anxiety. Those in the high-quality diet group had balanced levels of GABA and glutamate and a larger volume of gray matter in the brain.

GABA and glutamate are neurotransmitters. Neurotransmitters are chemical messengers that transmit signals between nerve cells and regulate various processes in the brain and body, such as mood, sleep, and cognition. Gray matter in the brain is involved in memory and emotions.

The researchers noted a trending relationship between increased rumination and decreased frontal gray matter volume. The researchers also observed a correlation between increased glutamate concentrations and increased rumination. Rumination is a major risk factor for anxiety and depression.

A 2019 animal study published in Food & Function showed that a diet high in sugar and saturated fat can decrease the number of parvalbumin interneurons (which contain and release GABA).

Poor-quality diets can also influence glucose and raise blood sugar and insulin levels. Studies show that high blood sugar may raise glutamate levels and subsequently lower the production and release of GABA.

Additionally, high-fat and high-cholesterol diets can also alter cell membranes, which can affect the release of neurotransmitters. A mouse study published in Nutritional Neuroscience in 2019 found that changes to the gut microbiome due to a poor diet are associated with depression-like behaviors. The mice were less social and exhibited a preference for sucrose, or table sugar.

Specifically, a reduction in good bacteria resulting from a diet rich in saturated fats is believed to influence the processes responsible for producing GABA and glutamate.

GABA and glutamate also play a significant role in regulating appetite and food intake. Decreased GABA or elevated glutamate levels may affect inhibitory control and could contribute to unhealthy food choices and overeating.

The Diet and Mental Health Connection

Andreas Michaelides, chief of psychology at Noom, told The Epoch Times in an email, “GABA (Gamma-Aminobutyric Acid) is an inhibitory neurotransmitter, meaning it reduces neuronal excitability and helps calm the brain. When GABA levels are stable and adequate, they help reduce anxious thoughts by calming the brain.”

Michaelides explained that glutamate is an excitatory neurotransmitter that heightens neuronal activity and is involved in learning and memory. Excessive glutamate activity can injure or kill neurons and damage the brain.

The balance between GABA and glutamate is crucial for healthy brain function,” said Michaelides. “When we have low levels of GABA, we have increased anxiety and depression.

Concerning glutamate levels, “certain symptoms and conditions, including anxiety, insomnia, and headaches, may indicate excessive glutamate activity,” he said.

How to Optimize Mental Health With Diet

Removing common culprits from your diet that disrupt neurotransmitter balance may support mental health and well-being.

“Certain foods can lower GABA levels or interfere with its natural function. Those foods are processed foods, alcohol and caffeine,” said Michaelides.

“Diets high in processed foods, refined sugars, and excessive protein can increase glutamate levels, these foods either directly contain glutamate or promote its production,” he added.

Processed foods and sugary snacks and beverages are also high in trans fats and refined sugars.

“These foods can cause inflammation and have been linked to higher rates of depression and anxiety. They can disrupt brain function and mood stability,” said Michaelides.

Rapid blood sugar fluctuations may also lead to mood swings and anxiety, with consistent consumption contributing to long-term mood instability.

It’s also best to limit alcohol consumption. Michaelides said, “Alcohol is a depressant that can disrupt neurotransmitter balance, leading to increased anxiety and depression over time.”

Excessive amounts of caffeine are also best avoided, as they can interfere with sleep and exacerbate anxiety.

When it comes to what to include in your diet to support mental health, appropriate protein intake is key.

“To have healthy neurotransmitter production, you must have proper protein intake,” said Michaelides.

When our bodies digest proteins, they are broken down into smaller molecules called amino acids. Amino acids make up neurotransmitters.

“In short, ensuring a varied protein intake supports optimal neurotransmitter function and mental health,” he said.

Sources of high-quality protein from fatty fish such as salmon and mackerel come with an added mental health boost. These high-quality proteins are rich in omega-3 fatty acids, which reduce inflammation and support neurotransmitter production, which is linked to lower risks of depression and improved cognitive function.

Other foods to add to your diet for a mental health boost include leafy green vegetables for their folate content. Michaelides noted that a folate deficiency is associated with a higher risk of depression.

Berries offer a boost in antioxidants and “protect the brain from oxidative stress, a factor linked to mental health disorders,” he added.

Nuts and seeds are excellent sources of magnesium, and sufficient magnesium intake is linked to reduced symptoms of anxiety and depression, he said.

Michaelides also recommends fermented foods such as kimchi and yogurt. “They promote a healthy gut microbiome, which can influence brain chemistry and improve mood,” he said.

Tyler Durden Mon, 08/26/2024 – 21:45

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Source: https://freedombunker.com/2024/08/26/new-study-explores-how-food-choices-shape-mental-health/


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