Vitamin B12 also speeds up the formation of new tissue and helps in the production of red blood cells that carry oxygen to your injured skin
As the processes of cell replication, nerve function and energy release that use B12 all need a wide range of other nutrients to work properly, it means that nothing will function fully if something is in short supply (it becomes a "limiting factor")
Other groups who may benefit include: Patients following gastric surgery (gastrectomy, bariatric procedures) where intrinsic factor production or absorption sites are compromised Individuals with malabsorption disorders such as Crohn's disease, coeliac disease, or chronic pancreatitis Strict vegans and vegetarians with dietary insufficiency, though oral supplementation is usually tried first Elderly patients with atrophic gastritis or reduced gastric acid production Patients on long-term metformin or proton pump inhibitors, which can impair B12 absorption Individuals with nitrous oxide exposure (recreational or medical), which can cause functional B12 deficiency Diagnosis typically involves serum B12 measurement, with levels below approximately 148 pmol/L (though thresholds vary between laboratories) generally indicating deficiency
As we age, our bodies often produce less stomach acid, which is essential for absorbing B12 from our food
