glycine is the precursor for glutathione in Our Diet and Its Role in Body: From Disease Prevention to Anti-Aging Glutathione Metabolism - an overview
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How does glutamine support the gut barrier

Dig Dis Sci 47:216224

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Jiang, L., Xia, Z., Zhu, R., Gong, H., Wang, J., Li, J., & Wang, L

It triggers the release of cytokines such as TNF- and IL-6 from macrophages

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