Other than some fatigue it does curb appetite pretty well
It is found naturally in animal-based foods and has a complex absorption pathway involving intrinsic factor and the terminal ileum
These factors include how often the injections are administered and the metabolism rate of the person
If vitamin B12 levels are low, people may experience: Persistent tiredness or fatigue Reduced energy levels Difficulty concentrating Dizziness or weakness For this reason, some travellers consider a B12 injection before a summer holiday in the North West UK to support normal energy levels and reduce travel fatigue
Vitamin B12 injections are given intramuscularly for those with a B12 deficiency related to age, pernicious anaemia, or low levels caused by a vegan or restrictive diet without supplementation
For long-term effect, 1 to 3 interventional procedures are usually required, spaced a few weeks apart