taste in mouth after b12 injection 10 Causes of Bitter Your Sublingual B12 vs. B12 Injections:

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These figures come from preclinical and pharmacokinetic literature, not from approved human dosing and note the standard route for this molecule is oral

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Gastrointestinal conditions such as celiac disease, Crohns disease or surgical changes like gastric bypass Older adults who may have reduced B12 absorption People who follow a strict vegetarian or vegan diet, as B12 is mainly found in animal-based foods People taking medications like PPIs or metformin or those with folate deficiency Real reddit experiences Below are some first-hand accounts from Reddit users: I was diagnosed with pernicious anemia after months of fatigue and neuropathy