B12 supplements are often used to treat or prevent deficiency, which can lead to symptoms such as fatigue, weakness, constipation, loss of appetite, and megaloblastic anemia
Natural history of autoimmune achlorhydric atrophic gastritis A 1-15-year follow-up study
They work differently, so "better" depends on what you're trying to address
Probably so that he can put me on the operating table
If you let it go for too long, it can cause problems in your nervous system such as: Vision problems Memory loss A pricking or numbing sensation Difficulty speaking or walking due to ataxia (loss of physical coordination) Damage to your extremities (hands, feet, arms, etc.), particularly your legs Other problems could include Infertility (this should go away with B12 treatment) Stomach cancer Bleeding and infections Damage your heart, brain, bones, and other organs in your body If you're pregnant and don't get enough vitamin B12, your baby is at risk of a serious birth defect called a neural tube defect