The Metabolic Health Lab

The Metabolic Health Lab

Gut-brain therapy

Natural strategies for treatment-resistant depression

Kristen Deuel, MSc's avatar
Kristen Deuel, MSc
Jun 29, 2025
∙ Paid

If you’ve been told you have “treatment-resistant” depression or if you feel like nothing’s fully working it might be time to look somewhere completely different: your gut.

Depression remains a leading global cause of psychiatric disability, affecting over 350 million people worldwide. While conventional treatments such as psychotherapy and pharmacotherapy offer relief for some, a significant portion of individuals experience treatment-resistant depression (TRD) or discontinue therapy due to adverse side effects. As the understanding of depression evolves, a new area of exploration has gained attention among researchers and clinicians alike, and it’s our gut-brain axis.

This bidirectional system, which links the gastrointestinal tract and the central nervous system, influences:

  • Mood regulation

  • Immune function

  • Neurotransmitter activity

Mounting evidence suggests that using psychobiotics (probiotic strains with neuroactive effects) and synbiotics (a combination of probiotics and their support…

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