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Nervous-System Support High-dose B1, B6, and B12 nourish peripheral nerves and aid cognitive performance

The reported adverse reactions following parenteral administration of vitamin B12 include: Generalized : Anaphylaxis and death Cardiovascular : Pulmonary edema and congestive cardiac/heart failure during early treatment

Smith TJ, Staats PS, Deer T, et al

If you have a lot of metallic dental fillings in your mouth, it may be the most obvious cause of a metallic taste

B12 absorption depends on a protein produced in your stomach called intrinsic factor

[10] Other uncommon adverse effects reported with very high doses include dermatological lesions (photosensitivity and skin rash), gastrointestinal upset, and in some cases dependency syndromes (e.g