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For aod-9604 for gut health specifically, the relevant mechanisms include

Liposomal Glutathione provides 100 mg of reduced glutathione per serving in a liposomal liquid format for enhanced absorption starting in the mouth, taken twice daily

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BPC-157 at 0.0045 mg/lb or 0.0000045 mg/lb reduced immobility time, indicating decreased behavioral despair, to a degree comparable to imipramine 15 mg (a tricyclic antidepressant) or nialamide 40 mg (an MAO inhibitor)