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Per-Batch HPLC + Disulfide Bond Verification Because the lipolytic conformation depends on an intact Cys7-Cys14 disulfide bond, every released lot is checked both by HPLC for peptide purity and by non-reducing LC-MS or Ellman's reagent analysis for disulfide bond integrity
However people with low homocysteine, mostly don't have these negative reactions to taking B12 as an injection or oral
Conclusion The bottom line is that you should always check with your doctor before getting B12 injections
2019 Jul 30;3(3):e244-e258
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