16 B12 has a half-life of approximately six days in the blood, which usually means that it takes around six days before half of the injected amount is eliminated from the body
That's where treatments like injectable B12 for humans come into play
When you eat meat, fish, eggs, or dairy products, vitamin B12 is released from protein by hydrochloric acid and enzymes in the stomach
Also record administration site so that the same site is not repeatedly used
human evidence is limited, the combination is unstudied, and individual results vary
The NHS treatment pathway and the 2024 NICE guideline both assume B12 injections are given in a clinical setting against a confirmed deficiency, not self-sourced and self-administered