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Several studies have shown that the first step in GSH synthesis involves the formation of -Glu-Cys in an ATP-dependent reaction catalyzed by GCL, which requires Mg 2+ or Mn 2+ as cofactors (Liu et al., 2021)

Independent replication of lifespan data outside Khavinson's laboratory

Understanding Vitamin B12 Deficiency: Causes and Symptoms Common Causes of B12 Deficiency Poor dietary intake (common in vegans and vegetarians)

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It specifically stimulates GH release from the pituitary gland without significantly affecting cortisol, prolactin, or other hormones

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