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Diet Vitamin B12 deficiencies in some people can be brought on by not eating enough foods that contain vitamin B12
It is supplied strictly for in-vitro laboratory research use only
Appetite and Nausea : Interestingly, a severe vitamin B12 deficiency can sometimes lead to a loss of appetite and even nausea
Also advise of any health or medication changes
[2] [3] However, reduced effectiveness can have multiple causes, and patients should consult their healthcare provider rather than simply replacing the medication
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