Proton pump inhibitors (PPIs) and H2-receptor antagonists (H2RAs) are commonly prescribed after bariatric surgery and can impair the release of B12 from food proteins, reducing absorption of food-bound B12 over time
Supplementation with high doses, extended periods of supplementation, or the combination of vitamin B12 with vitamins B1, B2, or B6, were suggested as possible causal factors of acneiform eruptions [5,6]
But what happens when you run low
Most people can benefit from a B12 injection, particularly those who live a busy life, are athletes, seniors, vegetarians, vegans, and those on prescription medications
10.1136/bmj.l4898 [DOI] [PubMed] [Google Scholar] Tanaka N., Yamazaki Y., Yamada H