Thats exactly why we always do a health check before going ahead, rather than treating it as a walk in, walk out treatment.
By keeping your B12 levels within a healthy range, you can avoid the severe complications associated with untreated pernicious anemia, such as irreversible nerve damage, heart problems, and memory loss

What a Meaningful Certificate of Analysis Should Include Complete chemical name Declared salt and counterion Free-cation and salt molecular weights where relevant Batch number and manufacture date Observed LC-MS result NMR identity evidence Counterion result Quantitative active-content assay Chromatographic purity Named and unknown impurity results Residual-solvent results Water or loss-on-drying result Elemental or inorganic-impurity testing where appropriate Method references and acceptance limits Testing-laboratory identity A clear statement of tests not performed Why 99% Purity Is Not Enough A single chromatographic percentage does not prove that the main peak is the correct positional isomer, that the counterion is correct, that the quantity is calculated properly or that residual solvents and inorganic impurities meet an appropriate specification

Additionally, electrophysiological experiments have shown the direct effects of B vitamins on pain transmission pathways in the spinal cord and thalamus, which explains the observed reduction or loss of pain sensation in clinical patients
Anti-nausea medications can help calm an upset stomach, while pain relievers can tackle headaches and body aches
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