Some of these events have been reported in patients without known underlying renal disease
Grall, A
There is no withdrawal period for meat, milk, and eggs
Also, sadly enough, there also are many types of (chronic) diseases that require B12 injections, such as Pernicious Anemia, people with Crohns, celiac, and people with intestinal imbalances, such as intestinal tapeworms and excessive bacterial growth

The signs and symptoms of B12 deficiency that indicate you may benefit from vitamin B12 injections include: chronic fatigue, lethargy and weakness Muscle aches, joint pain and trouble exercising Poor memory, inability to concentrate and other cognitive problems associated with aging Mood changes, like increased depression and anxiety, or signs of nervousness like rapid heartbeats/palpitations Poor dental health, including bleeding gums and mouth sores Shortness of breath and feeling dizzy Poor appetite or digestive problems, like constipation, nausea, diarrhea or cramping Sometimes greater risk for problems like cardiovascular complications or even cancer (due to a rise in homocysteine levels) Why might you be low in vitamin B12, even if you eat a relatively healthy diet