La Habra, CA 55Â° New York, NY 43Â° Miami, FL 69Â° Los Angeles, CA 57Â° Browse for your location
Vitamin B 12 (cobalamin) deficiency is a common cause of macrocytic anemia and has been implicated in a spectrum of neuropsychiatric disorders.The role of B 12 deficiency in hyperhomocysteinemia and the promotion of atherosclerosis is only now being explored.itamin B 12 deficiency, therefore, can lead to increased levels of serum methylmalonic acid. In the second reaction, homocysteine is converted to methionine by using vitamin B 12 and folic acid as cofactors. In this reaction, a deficiency of vitamin B 12 or folic acid may lead to increased homocysteine levels.
1 pernicious anaemia â where your immune system attacks healthy cells in your stomach, preventing your body from absorbing vitamin B12 from the food you eat; this is the most common cause of vitamin B12 deficiency in the UK.itamin B12 is found in meat, fish, eggs, dairy products, yeast extract (such as Marmite) and specially fortified foods. The best sources of folate include green vegetables such as broccoli, Brussels sprouts and peas. Read more about treating vitamin B12 or folate deficiency.