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nonetheless, subgroup analysis based on different diagnostic methods indicated a correlation between PPI use and SIBO when assessed using small intestine aspirate culture or the glucose hydrogen breath test but not when using the lactulose hydrogen breath test (Su et al., 2018)

GHK-Cu has been studied more broadly for tissue repair and inflammation, while AHK-Cu has direct laboratory research involving human dermal papilla cells and isolated hair follicles

Cortex 109, 181188

Evidence and Clinical Research Evidence-Level Definitions: Established clinical evidence: Supported by multiple peer-reviewed human studies