exercise glutathione pubmed Frontiers Glutathione supplementation suppresses muscle fatigue
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Pirouzpanah S

10.1002/tox.23905 [DOI] [PubMed] [Google Scholar] Mahdian M., Asrari S

64 One significant study demonstrated that after 16 weeks of treatment with metformin, diabetic patients had lower vitamin B 12 concentrations in comparison to participants not receiving this drug or non-diabetic controls

Your doctor may adjust the dose if necessary based on your condition
