tryptophan

Updated: May 14, 2025

But that is not the end of the chain reaction. Insulin regulates blood sugar levels but also raises brain levels of an amino acid called tryptophan. Tryptophan is the raw material the brain uses to manufacture a neurotransmitter called serotonin. And serotonin plays a huge role in regulating mood. Higher brain levels of serotonin create a feeling of well-being.

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