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Your provider will specify this

It contains no additives

[12] It even helped to increase mobility in chronically stressed rats in that study

That often includes: Older adults who naturally absorb less B12 from food Vegans and vegetarians who dont eat enough B12-rich foods People with stomach or gut issues (like Crohns or coeliac disease) Those on long-term medication that affects absorption Busy people who feel drained all the time and cant explain why If you fall into one of these groups, injections might be worth considering

Once opened, the injection-grade water can easily become contaminated

That nail involvement figure stands out