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The general advice is to review your symptoms to establish if you may have an undiagnosed B12 deficiency

Medications and supplements A metallic taste in the mouth is a common side effect of certain medications, such as antibiotics ( metronidazole , clarithromycin , tetracycline ), blood pressure medications ( captopril ), gout medicines ( allopurinol ), diabetes medications ( metformin ), glaucoma medicines ( methazolamide ), and psychiatric drugs ( lithium )

Withdrawal of Approval of 92 New Drug Applications and 49 Abbreviated New Drug Applications (2009)

Prepare a Clean, Safe Area Your injection environment needs to be spotless

This is why some people have normal levels on paper but still experience a deficiency

Well help you understand how these two peptides work and the science behind them