Uncommon side effects include constipation, diarrhea, irregular heartbeat, fatigue, and anxiety
It is not approved by the FDA or any other regulatory body for human or veterinary use, and nothing in this guide constitutes guidance for human administration
There is only the very minor and fleeting discomfort of an injection
Vitamin B12 is found exclusively in animal foods or foods fortified with this vitamin, such as: Meat and chicken: especially organ meat and red meat like beef Fish and seafood: especially clams, sardines, tuna, trout, and salmon Dairy: including milk, cheese, and yogurt Eggs: especially egg yolk Fortified foods: breakfast cereal, nutritional yeast, as well as some mock meats or plant milks Supplements, which are widely available in stores and online, are another way to meet your daily requirements