Brain Chemicals and Food

What brain chemicals do, and how food and habits support the systems that make them.

Neurotransmitters are the brain’s chemical messengers. Tap a card to turn it over.

About 3 min read

Food does not directly raise a brain chemical. The brain tightly controls its own chemistry. What you eat supplies building blocks and supports the systems that make and use these chemicals, along with sleep, movement, and relationships. The habits listed on the cards are linked with healthy brain function in general. Research has not shown that any single habit raises one particular chemical.

Brain chemical

Serotonin

What it does: Involved in mood, sleep, appetite, and digestion. Most of the body’s serotonin is made in the gut, where it mostly helps digestion.

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Serotonin

Building blocks: The body makes it from tryptophan, an amino acid found in protein foods such as eggs, fish, poultry, dairy, beans, nuts, and seeds, with help from vitamin B6.

Habits that support it: Daylight, regular movement, and a steady sleep schedule.

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Brain chemical

Dopamine

What it does: Involved in movement, motivation, and learning from rewards.

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Dopamine

Building blocks: Made from the amino acids phenylalanine and tyrosine, found in protein foods. Iron and vitamin B6 help the process.

Habits that support it: Movement, small goals, new experiences, social connection, and enough sleep.

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Brain chemical

Norepinephrine

What it does: Raises alertness and attention and is part of the stress response.

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Norepinephrine

Building blocks: Made from dopamine, so it uses the same building blocks.

Habits that support it: Regular exercise, enough sleep, and ways to calm stress.

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Brain chemical

GABA

What it does: The brain’s main calming messenger. It slows signaling and helps keep activity in balance.

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GABA

Building blocks: The brain makes it from glutamate, with help from vitamin B6. It is not clear how much GABA from food or supplements reaches the brain.

Habits that support it: Sleep, exercise, mindfulness or breathing practices, and limiting alcohol, which acts on GABA systems.

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Brain chemical

Glutamate

What it does: The brain’s main “go” messenger, important for learning and memory.

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Glutamate

Building blocks: The brain makes its own. Most glutamate in food is used by the gut and does not reach the brain in meaningful amounts, so food additives such as MSG are not a known cause of anxiety.

Habits that support it: Learning, rest, and balance between “go” and “calm” signals.

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Brain chemical

Acetylcholine

What it does: Supports memory, attention, and muscle movement.

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Acetylcholine

Building blocks: Made using choline, found in eggs, fish, meat, beans, and some vegetables. Many people in the US and elsewhere do not get the recommended amount.

Habits that support it: Mental stimulation, sleep, and social engagement.

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Brain chemical

Endorphins

What it does: The body’s natural pain relievers, thought to be released during exercise, laughter, and closeness with others.

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Endorphins

Building blocks: They are small proteins (peptides) built from amino acids, so no particular food is needed to make them.

Habits that support it: Movement, laughter, music, and time with people you trust.

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Not a simple “imbalance.” Mood and mental health are not caused by a single chemical being too high or too low. See The Brain: Anatomy, Cells, and Chemistry for more.

Sources

National Institute of Neurological Disorders and Stroke. Brain Basics: Know Your Brain.
Layunta, E., et al. (2021). Crosstalk between intestinal serotonergic system and pattern recognition receptors on the microbiota–gut–brain axis. Frontiers in Endocrinology, 12.
Moncrieff, J., et al. (2023). The serotonin theory of depression: a systematic umbrella review of the evidence. Molecular Psychiatry, 28.
Marx, W., et al. (2021). Diet and depression: Exploring the biological mechanisms of action. Molecular Psychiatry, 26(1), 134–150.

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Within Your Light is an educational platform. We do not provide medical advice, diagnosis, or treatment recommendations. This page is for educational purposes only and is not a substitute for professional medical advice. Always consult a healthcare provider before making significant dietary changes or if you have concerns about your mental health.