The pain relief should last for weeks or even months
So, if for example you experience worse fatigue after B12 injections, it might be a brief phase where your body is still using the unhealthy red blood cells
Your Overall Health Underlying health conditions, such as gastrointestinal disorders (like Crohns disease, celiac disease, or atrophic gastritis) that impair nutrient absorption, or certain medications you may be taking, can influence how your body absorbs and utilizes B12
Sikiric et al., 2020b), it may be indeed that it may endogenously maintain gastrointestinal mucosa integrity (Sikiric et al., 1993
Older adults, especially in isolation and those with cognitive decline/dementia, may become more anxious, angry, stressed, agitated and withdrawn during the outbreak or while in quarantine