Western Diet: Implications for Brain Function and Behavior.

Area of Science:

• Neuroscience
• Nutritional Psychiatry
• Microbiome Research

Background:

• The Western diet (WD) is linked to obesity, cognitive impairment, and emotional disorders.
• WD alters gut microbiota, impacting the gut-brain axis and brain function.
• Highly palatable WD foods may induce addictive eating behaviors and hypothalamic-pituitary-adrenal (HPA) axis dysregulation.

Purpose of the Study:

• To review the scientific evidence connecting WD consumption to altered brain function and behavior.
• To elucidate the mechanisms and factors involved in WD-induced brain changes.
• To discuss potential therapeutic interventions and limitations for preventing these effects.

Main Methods:

• Literature review of current scientific evidence.
• Analysis of studies on WD effects in animal models and humans.
• Examination of the gut-brain axis, HPA axis, and neuroinflammation pathways.

Main Results:

• WD consumption is associated with altered gut microbiota composition.
• WD can lead to HPA axis dysregulation, contributing to stress, anxiety, and depression.
• Obesity and overweight resulting from WD induce neuroinflammation and neuronal dysfunction.
• Chronic stress negatively affects brain regions like the hippocampus, hypothalamus, and amygdala.

Conclusions:

• The Western diet poses significant risks to brain function and mental health through multiple interconnected pathways.
• Understanding these mechanisms is crucial for developing effective interventions against diet-related neurological and emotional disorders.
• Addressing the pandemic of WD-related health issues requires a multifaceted approach targeting diet, stress, and the gut microbiome.