by Isabella Backman, Yale University Vitamin B12 intake, absorption and metabolism, and the etiologies of vitamin B12 deficiency (image created by Tova Gardin using Biorender.com). Credit: BMJ Case Reports (2023). DOI: 10.1136/bcr-2023-254727Nitrous oxide is readily accessible to those who want to use it recreationally for the high it can provide. With just a few clicks, it...