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For example, Bifidobacterium promote the proliferation of beneficial commensals and inhibit the growth of pathogenic bacteria, thereby improving intestinal barrier function and nutrient absorption efficiency (Li et al., 2025)

Studies using fetal lung fibroblasts found GHK induces dose-response gene expression changes in 329 genes associated with extracellular matrix composition

It is desensitization

These compounds come from different biological origins and modulate different molecular pathways, which is why researchers often use them in combination rather than as substitutes: BPC-157's distinguishing research angle is its gastric origin and mucosal-protection phenotype : it is the only compound in this cluster with published preclinical evidence in GI mucosa models, and the only one routinely studied under oral administration