There are quite a few people who just are not able to get enough vitamin B12 without receiving it through regular injections for a multitude of reasons, most often including dietary restrictions or medical conditions
Always disclose your complete medical history, including any existing health conditions, medications, and supplements you are taking, to your doctor
Common symptoms of vitamin B12 deficiency: Fatigue and a subjective feeling of low energy levels Hair loss and changes in skin color (usually manifests as pale skin) Brain and cognitive issues like decreased memory, depressive-like symptoms, mood changes, and brain fog Shortness of breath or difficulty with sustained exercise Megaloblastic anemia Depression and even a dementia-like syndrome can be confused with Alzheimers Nerve conditions like nerve pain and peripheral neuropathy Why are the symptoms so diverse
In terms of GI effects, it can cause gas, (sometimes with discharge), urgent or increased bowel movements, oily or fatty stools, loose stools, discolored stool, nausea, vomiting, diarrhea, and rectal and stomach pain