Some people are far more likely to run low on B12: Vegans and vegetarians, since B12 comes mainly from animal foods Older adults, because we absorb B12 less efficiently with age People with Crohn's, celiac, or other digestive conditions Anyone who has had gastric bypass or bowel surgery People taking metformin, antacids, or acid reducers long term Heavy alcohol users How B12 injections support weight loss Here is the honest version: B12 is not a fat-burning drug, and a shot will not melt away pounds on its own
doi:10.1073/pnas.050909910
[DOI] [PMC free article] [PubMed] [Google Scholar] 18.El-Haschimi K, Pierroz DD, Hileman SM, Bjrbaek C, Flier JS
B12 deficiency can increase the risk of birth defects and may contribute to premature birth or miscarriage
This direct route makes it incredibly effective, especially for anyone who struggles with absorbing B12 through their gut, such as those with pernicious anemia