Like many other medications, B12 injections require a doctors prescription and cant simply be purchased over the counter
Some of the best dietary sources of B12 include [3]: Beef Turkey Salmon, tuna, and clams Eggs Milk, yogurt, and cheese Nutritional yeast Fortified breakfast cereals Bananas and strawberries Spinach Kidney beans Due to dietary restrictions, vegetarians and vegans are at risk of low levels of B12
The surgical alterations permanently compromise b12 absorption through multiple mechanisms
Even so, taking expired supplements may lead to deficiencies if people believe that they are ingesting more of the nutrient than they really are
What we DO know, however, is that only 20% (or even less) of the people with symptomatic B12 deficiency have anaemia or altered size of the red blood cells
Vitamin B12 injections are taken as an intramuscular injection into the upper shoulder