Long-term use of proton pump inhibitors: an overlooked risk factor of vitamin B12 deficiency?

维生素B12缺乏症在加拿大很常见。它会导致贫血和神经系统症状（如足部麻木）。未确诊的维生素B12缺乏症会对神经系统造成严重且不可逆转的损害。因此，了解谁有被感染的风险是很重要的

Vitamin B12 deficiency is common in Canada. It causes anemia and neurological symptoms (ex. foot numbness). Undiagnosed vitamin B12 deficiency can lead to severe and irreversible damage to the nervous system. It is thus important to know who is at risk of