Lie on stomach, prop up on elbows, then progress to pressing up on hands
Once optimal levels are achieved, the frequency might be reduced to monthly injections for maintenance
Certain health conditions such as intestinal or stomach problems, poor nutrition, cancer, HIV, pregnancy, old age, veganism, and alcoholism can cause vitamin B12 deficiency
Can you inject both on the same day
Regular monitoring is one reason vitamin B12 injections are considered safe and effective when managed properly
A useful overview of that link is in microbiota-immune, which explains how microbes steer immune behavior