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3pgt: X Ji, J Blaszczyk, B Xiao, R ODonnell, X Hu, C Herzog, SV Singh & P Zimniak (1999) Structure and function of residue 104 and water molecules in the xenobiotic substrate-binding site in human glutathione S-transferase P1-1
However, with severe vitamin B12 deficiency or absorption issues, healthcare professionals may recommend an intramuscular injection rather than an oral supplement
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