This guideline covers recognising, diagnosing and managing vitamin B12 deficiency in people aged 16 and over, including deficiency caused by autoimmune gastritis. It also covers monitoring for gastric cancer in people with autoimmune gastritis.

本指南涵盖了16岁及以上人群维生素 B12 缺乏的识别、诊断和管理，包括自身免疫性胃炎引起的缺乏，还强调在自身免疫性胃炎患者中监测胃癌。