The lowered absorption rate and increased frequency attributed to oral supplements can cause the overall treatment process to be slower than that of B12 injections
Key Takeaways Injections bypass common absorption issues : If youre not feeling the benefits of a B12-rich diet or oral supplements, it might be because your body cant properly absorb the nutrient
B12 (cobalamin) is a water-soluble vitamin essential for neurological function, red blood cell formation, and DNA synthesis Joint pain is not listed as a recognised adverse effect in the BNF or licensed B12 product information When joint discomfort occurs after starting B12, it is typically coincidental or related to excipients, injection technique, or pre-existing conditions Severe B12 deficiency itself can cause neuropathic symptoms that may be misinterpreted as joint pain Do not discontinue prescribed B12 treatment without medical guidance, particularly for confirmed deficiency or pernicious anaemia Seek prompt medical advice for severe joint pain, hot swollen joints with fever, or symptoms of allergic reaction Table of Contents Can Vitamin B12 Cause Joint Pain
Certain drugs may also interfere with lab tests for vitamin B12 levels
These symptoms relate primarily to GLP-1 receptor activation slowing gastric motility and affecting appetite centers in the brain