Injections are more effective in these cases
Major sources include: Foods Rich in Vitamin B12 Vitamin B12 is naturally found primarily in animal-based foods, such as: Beef liver and pork liver (the most concentrated sources) Red meat, poultry, and fish Eggs, especially egg yolks Shellfish such as clams and oysters Fatty fish like salmon, tuna, and sardines Dairy products including cows milk, yogurt, and cheese For individuals who follow a vegetarian diet, Vitamin B12-fortified foods can be a helpful choice, such as fortified cereals or fortified soy milk
Thiamine is not stored in the body at any detectable level, and the amount that exceeds the body's needs is excreted in the urine as thiamine or unchanged metabolites
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Better absorption: B12 shots are much better at getting the vitamin into your body than pills
It is more pocket-friendly for patients