Neo-B12 Injection is given as an injection, into a muscle
The thread on tests for PA and B12 deficiency mentions other tests that can help to diagnose PA eg gastrin test and others (link in my other reply) When you were tested for coeliac disease
Why Vitamin B12 Deficiency Is Often Missed in Aging Adults Vitamin B12 deficiency is often missed because the symptoms fatigue, anemia, neuropathy, memory problems, or walking difficulties are quite common in older adults, and can easily be caused by something else
For most Australians eating a conventional mixed diet, these natural food sources are sufficient to meet the recommended dietary allowance, which, for adults, is around 2.4 mcg per day, according to the Food and Nutrition Board