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Sequence-confirmed identity Mass-spectrometry analysis verifies the 15-amino-acid sequence matches the listed specification
Structured next steps and repeat testing Repeating the test is worthwhile when intake, a recent injection, acute illness, or a preanalytical issue, meaning a problem with the sample before it was measured, could explain the value, using the same laboratory or a comparable assay so the trend is interpretable
These symptoms are typically more common with higher-strength preparations
20 Systematic reviews: Oral vitamin B 12 replacement for the treatment of pernicious anemia 21 Relevant articles were identified by PubMed search from January 1, 1980 to March 31, 2016, focusing on patients with pernicious anemia
Vitamin B12 plays a crucial role in body energy production, helping convert food into energy and supporting red blood cell production, which can alleviate fatigue
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