Maintenance doses usually involve: 1 injection every 1 to 3 months for those who are not able to maintain adequate B12 levels through diet alone or have ongoing absorption issues
Malabsorption of vitamin B12, resulting from structural or functional damage to the stomach, where intrinsic factor is secreted or to the ileum, where intrinsic factor facilitates vitamin B12 absorption
Although a vitamin B12 overdose is rare, research suggests that some groups of people are at a greater risk of adverse effects from taking an excessive amount of the nutrient
For many patients, their injections dont last long enough Some clinicians assume (incorrectly) that 1000 mcg of B12 should last patients at least 200 days, calculating from a 5 mcg daily requirement for the vitamin
Here's the general pattern folks tend to experience
If you show any signs of B12 deficiency, start by injecting daily