An elevated serum vitamin B12 is easy to misread, because the test was built primarily to detect the opposite problem
In short: B12 shots are used because they deliver vitamin B12 faster, more reliably, and more efficiently than oral supplements, especially if you have an absorption issue
When your sugar metabolism slows down, it can cause fat gain and other health problems
Conversely, medications that further slow gastric emptying, such as anticholinergics or opioid analgesics, may exacerbate gastrointestinal adverse effects including nausea, vomiting, and constipation
These logistical factors affect planning but not the actual dosing process
This population-specific safety evidence is more relevant for clinical application than data from exclusively healthy volunteers would be