Vitamin B12 (cobalamin) plays an essential role in red blood cell formation, cell metabolism, and nerve function
These subjective reports are impossible to verify without controlled trials
Assuming they were diagnosed early, participants also expressed similarly strong interest in taking medications to lessen symptoms (94%), as well as receiving education and support for lifestyle changes (90%) (Figure 25, right panel)
Some patients may experience mood changes, including depression or anxiety, particularly during the initial weeks of treatment
For most nonpregnant, non-breastfeeding people without specific allergies, adverse events are limited to mild and transient flu-like effects and (for injectables) injection site reactions