Vitamin B-12 is produced by certain microorganisms, primarily bacteria, found in the environment. These bacteria can be found in:
* Animal products: Meat, poultry, fish, eggs, and dairy products contain B-12 because animals get it from the bacteria in their gut.
* Fortified foods: Some plant-based foods and breakfast cereals are fortified with B-12.
If you are concerned about your B-12 levels, it's important to consult with a doctor for personalized advice.
