People with symptoms of vitamin B12 deficiency It is a good idea for anyone with the following signs and symptoms of a vitamin B12 deficiency or pernicious anemia to consult a doctor: People with gastrointestinal issues Conditions that affect the gastrointestinal tract may affect vitamin B12 release or absorption, including: pernicious anemia, which can lead to gastric atrophy, or damage to the stomach fish tapeworm infestation bowel or pancreatic cancer folic acid deficiency overgrowth of bacteria in the small intestine diabetes thyroid disease Crohns disease celiac disease chronic pancreatitis People who have undergone gastrointestinal surgery, including weight loss, may have fewer cells necessary to secrete stomach acid and intrinsic factor
For more on B12 form and absorption, see our guide to liquid vitamin B12, and on whether B12 affects the scale, our B12 and weight loss explainer
This interaction stimulates collagen production, which is vital for maintaining skin elasticity and firmness (1)
Vitamin B12 , also known as cobalamin, is essential for red blood cell formation, DNA synthesis, and neurological function
The cost of a single vitamin B12 injection dose is 50 (per IM injection)