Vitamin B12 is an essential vitamin required by our body for the formation of red blood cells and DNA
Your liver can store B12 for up to five years, but once those stores are depleted, symptoms can develop rapidly
People with B12 levels below 200 pg/mL are called B12 deficient and are likely to have symptoms - this could be due to medicines, strict vegetarian diets, or medical conditions
Stuart (US authors) Some forum members have met health professionals with poor understanding of PA and B12 deficiency Misconceptions about a B12 deficiency (From Dutch B12 website - units, ref ranges, treatment patterns may vary from UK) stichtingb12tekort.nl/engli
[1] [20] The primary functions of vitamin B12 include supporting the formation of red blood cells, maintaining the health of nerve cells, and facilitating DNA synthesis
Remember though that the restriction is about the delivery by injection