If youre not consuming enough B12 in your daily diet, you can get it in other ways, such as via oral supplements, injections, or IV infusions
For example, one study found that after taking 1,000 mcg of oral vitamin B12, only about 1.3% (13 mcg) is absorbed into the bloodstream
People with pernicious anemia or people who cannot absorb vitamin B 12 from their intestines will need injections of vitamin B 12 every one to three months indefinitely
Standard practice after bariatric surgery includes routine b12 monitoring and supplementation
These may include mild digestive changes (nausea, altered bowel movements), increased energy levels that may feel stimulating initially, mild headaches (often related to dehydration), and minor injection site reactions (redness, temporary discomfort)
New or unexpected symptoms : Whilst rare, allergic reactions to hydroxocobalamin can occur