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Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure
Who Benefits from B12 Injections Patients with Documented Deficiency Blood work showing low serum B12 (below 200 pg/mL) confirms deficiency
for example, a poor diet can cause slow gut motility, which can negatively impact nutrient absorption, which can further impact muscle tone and create a vicious cycle
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