5. Immune System
Don’t have hepatitis C? You can probably still benefit from a generally stronger immune system! B12 also strengthens the immune system against colds, flu and other viruses and might help to prevent you from taking so many sick days!
This is something that shouldn’t be understated. Even when you aren’t sick in bed, you may often find your body combating low-level infections and bugs, which can prevent you from performing at your very best and create issues such as inflammation of the brain through pro-inflammatory cytokines.