B12 is a required cofactor for DNA synthesis without enough of it, cells can't replicate efficiently
As everyone is different, it is impossible to say with 100% certainty how long a vitamin B12 injection lasts in the body
The most commonly reported side effects are mild and transient, including injection site reactions (redness, slight swelling, or tenderness), mild headaches during the initial days of use, and occasional dizziness or lightheadedness, particularly when starting the peptide
You'll usually feel them as a fluttering or ripple just beneath the skin, most often in the eyelids, calves, feet, or arms, and they tend to be most noticeable when you're sitting or lying still
Later work examined NNMT inhibition combined with dietary changes in obese mice, reporting reductions in body weight, fat mass, and hepatic fat, alongside shifts in gut bacterial populations