Déficit de vitamina B12 en grupos vulnerables con alimentación omnívora

Introduction: vitamin B12 plays an essential role in growth and neurodevelopment. Vitamin B12 deficiency is a public health problem in Argentina, with a high prevalence in a highrisk population, such as pregnant women and children with a vulnerable social situation, although their omnivorous diet. Objectives: to update the information available on vitamin B12 deficiency in vulnerable populations, in order to highlight the importance of the subject, to achieve an early diagnosis and timely treatment and thus prevent irreversible complications. Results: it is important that the pediatrician knows the different types of vitamin B12 deficiency presentation and to consider it as a differential diagnosis in children with neurological symptoms, even in the absence of anemia, to achieve early interventions and diminish the burden of disease. Many researchers have concluded that an isolated marker can lead to misdiagnoses, so it is currently recommended to use at least two. Most of the treatments evaluated, agree on the administration of 1 mg of B12, for 7 to 10 days, either intramuscular or orally, followed by 3 to 11 weeks of a weekly dose. Conclusions: it is important to update data on the prevalence of B12 deficiency in our country, as well as the implementation of therapeutic interventions and preventive public policies.