Exploring the connection between nutrition and mental health

“You are what you eat” is truer than we think, especially when it comes to mental health. Our brains rely on the nutrients we get from food to create energy, help regulate mood, and support the production of hormones and building blocks for brain health. The composition of the food you consume influences energy levels, mood stability, stress response, and even how individuals respond to treatment. When these factors are considered as a part of clinical care, the impact can be meaningful treatment outcomes.

Find out how nutrition is an often overlooked, yet important factor, in behavioral health treatment outcomes.

How food affects the brain

The brain uses approximately 20% of the body’s energy and depends on a steady supply of vitamins, minerals, amino acids, and healthy fats to function effectively. These nutrients play a direct role in producing neurotransmitters such as serotonin, which regulates mood, sleep, and appetite.

When individuals consistently consume a diet lacking in nutrient-dense foods — whether due to dietary habits, limited access, or food insecurity — the effects may include:

• Increased fatigue and reduced cognitive functioning.
• Greater difficulty regulating mood.
• Heightened stress response.
• Increased risk of disease.

Gut health also plays a role in the quality of a person’s mental health. The gut microbiome, (the tiny bacteria in your gut) is a key player in the communication pathways between the brain and nervous system. This bi-directional communication system is also responsible for many of the processes related to how the body manages inflammation, food absorption, and immune responses to toxins and stress. In turn, the food that we consume informs the composition of our microbiome. Our gut health is directly correlated with our risk for chronic diseases, including those related to mental health.

Research  shows that diets high in ultra-processed foods, added sugars, and unhealthy fats can raise the risk of depression and anxiety. On the other hand, studies  show eating more whole foods, fruits, vegetables, and healthy fats may boost mood and overall well-being.

Key nutrients tied to mental health include:

• Omega-3 fatty acids: Support brain function and may contribute to improved mood symptoms of anxiety and depression.
• B vitamins: Critical for mood regulation and energy metabolism.
• Minerals: Iron, zinc, magnesium, and selenium, for example, support stress response and cognitive performance.
• Antioxidants: Reduce inflammation associated with mood disorders.
• Fiber and fermented foods: Support gut health and influence a diverse microbiome.

While nutrition has not been traditionally implemented as a standalone treatment for depression or anxiety, evidence suggests it can enhance overall well-being, stabilize mood, and potentially improve treatment outcomes when integrated into broader care strategies.