But the injection volume at higher doses gets large
Good sources include: Meat (especially liver and kidney) Fish (salmon, trout, tuna, sardines) Shellfish (clams, mussels) Eggs Dairy products (milk, cheese, yoghurt) Fortified foods (breakfast cereals, plant milks, nutritional yeast) The recommended daily intake for adults is 2.4 micrograms
People following vegetarian or vegan diets may also need a more reliable source, since B12 is primarily found in animal products
Am J Clin Nutr 2007;86:13029
As the body adjusts to the dosage, they fade
However, early results suggest that lecanemab and donanemab continue to have clinical benefit after four and three years use (including the clinical trial period), respectively