You have higher levels of the chemicals homocysteine and methylmalonic acid and reduced DNA synthesis, leading to neurological and psychological symptoms, such as confusion, mood swings, problems walking or talking, and irritability
These are typified by the following two enzymes: Methylmalonyl-CoA mutase [edit] Methylmalonyl coenzyme A mutase (MUT) is an isomerase enzyme that uses the AdoB 12 form and reaction type 1 to convert L-methylmalonyl-CoA to succinyl-CoA, an important step in the catabolic breakdown of some amino acids into succinyl-CoA, which then enters energy production via the citric acid cycle
If you suspect B12 deficiency, blood testing can confirm your serum B12 level and guide an appropriate supplementation strategy in consultation with your healthcare provider.
239.) Available from: Vitamin B12, Fact Sheet for Health Professionals, National Institutes of Health, Office of Dietary Supplements Vitamin B12, Fact Sheet for Health Professionals, National Institutes of Health, Office of Dietary Supplements Homocysteine, Cleveland Clinic,