Vitamin B12 is found naturally in various food sources, including animal products like meat, fish, poultry, eggs, milk, and milk products ( Its also added to many fortified foods, such as breakfast cereals and plant-based milk like almond, soy, or hemp milk ( Vitamin B12 supplements are also available in several forms, including tablets, capsules, liquids, and lozenges
Less acid means less available B12
Morning vs evening injections Morning injections mean any initial side effects (nausea, headache , fatigue ) peak during the day when you are awake and can manage them
Levels typically rise faster and more reliably with injections than with oral dosing for patients who have an absorption issue
Potkin, S
Protects Against Heart Diseases A study about cardiovascular diseases among vegetarians found that if the lack of Vitamin B12 in vegetarian diets is not balanced with supplements or injections , then the cardiovascular benefits of vegetarian food will become redundant