Answer: Most beginners in a research context start with 0.5 mg per week
It is recommended that adults over the age of 50 increase their sources of vitamin B12 through diet, fortified foods, B12 shots, or other supplements that can increase their B12 consumption. (By The National Institutes of Health) GASTROINTESTINAL ISSUES AND B12 SHOTS Persons who have gastrointestinal issues are particularly predisposed to issues with B12 deficiencies
Differentiating from Other Conditions Neurological signs and symptoms can be vitamin B12 deficiency associated or due to other causes such as: Pernicious anemia Syphilis Neurosyphilis Human immunodeficiency virus (HIV)-associated vacuolar myelopathy Toxic neuropathies Tropical myeloneuropathy Your healthcare provider can make a proper diagnosis based on your symptoms, medical history, physical exam, and laboratory test findings
[PubMed] [Google Scholar] 115.Smirnova E, Goldberg EB, Makarova KS, Lin L, Brown WJ, Jackson CL
