J Nutr Biochem
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
Addressing the Core Question This is where things get interesting, and the short answer is: yes, you can take B12 tablets as well as injections, but crucially, this should always be under the guidance of a healthcare professional
They are not for human consumption, veterinary use, diagnostic procedures, cosmetic use, therapeutic applications, or medical treatment
Heavy alcohol use may reduce the absorption and use of B-vitamins, while smoking can lower your body's vitamin C levels