Nerve pain, or neuropathic pain, associated with vitamin B12 deficiency typically manifests as tingling, numbness, burning sensations, or sharp pains in the hands and feet
Some protocols involve longer continuous use for 6-12 months with ongoing monitoring
A retrospective study looking at concomitant use of proton pump inhibitors (PPIs) alongside metformin in 614 people with type 2 diabetes in the US found a significant reduction in B12 levels of 34% in patients taking both medications, compared to controls taking either drug alone (Long et al, 2012)
Chen, Q., Wu, W., Wang, L., Huang, H., & Wang, L
You need to query it and get it re-tested
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