Thyroid-Gut-Brain Axis
Understanding the interconnected relationship between endocrine, gastrointestinal, and neuropsychiatric function
Axis Insight
Thyroid dysfunction, gut dysbiosis, and neuropsychiatric illness share a common root — and addressing the axis together outpaces treating each system in isolation.
Rule Out Infection First
Look at infection first
When thyroid symptoms, gut issues, and cognitive fog show up together, it's tempting to treat each one separately. But this combination is a common presentation of chronic infection — most cases haven't had Lyme or coinfections ruled out, largely because standard Western blot and PCR testing often aren't sensitive enough to detect them.
We look at infection first, since treating the root cause can resolve symptoms across all three systems at once.
60-70%
Of celiac patients experience psychiatric symptoms (Hansen et al., Acta Psychiatrica, 2023)
3x
Increased risk of bipolar disorder in untreated celiac disease (Nilsson et al., Scandinavian Journal, 2026)
40-50%
Higher depression & anxiety rates vs. general population (Mathialagan & Rondla, AJMS, 2023)
5-15x
Higher prevalence of autoimmune thyroid disease in celiac patients (Dore et al., Journal of Clinical Medicine, 2022)
The Thyroid-Gut-Brain Connection
Thyroid dysfunction, gut dysbiosis, and neuropsychiatric disease are fundamentally interconnected through multiple biological pathways: hormonal signaling, microbial metabolite production, immune activation, and intestinal barrier integrity. Chronic infection, dysbiosis, and increased intestinal permeability perpetuate dysregulation across all three systems.
At Newport Integrative, we use advanced diagnostics to identify and target the drivers disrupting this essential axis.
Comprehensive Diagnostic Approach
Thyroid Panel
TSH, free T4, free T3, TPO, thyroglobulin antibodies
Microbiome Analysis
NGS-based dysbiosis assessment and pathogenic mapping
Barrier Function
Zonulin, LPS, inflammatory markers, intestinal permeability
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