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doi: 10.1006/bbrc.1997.6622, 11
Many functional medicine plans combine the two layers
However, they should not substitute a balanced diet rich in vitamin B12
Weight of evidence: Overall evidence is Low-Moderate: multiple animal studies and a growing number of small clinical trials suggest benefits across gutbrain signaling, social and behavioral domains, gastrointestinal symptoms, and neurophysiological patterns, yet most human studies rely on caregiver-reported outcomes, lack biomarker integration, and seldom control for diet, comorbidities, or baseline microbiome composition
Glutathione in dogs supports the liver in detoxification