The 2mL ratio (producing 2.5mg/mL) is the best choice for most researchers starting out
This includes confirmed low serum vitamin B12 levels, pernicious anaemia, malabsorption states such as coeliac disease, inflammatory bowel disease, or post-gastric or bariatric surgery, unexplained anaemia, neuropathy or neurological symptoms consistent with vitamin B12 deficiency, a long-term vegan diet with symptoms or low levels, or failure of oral vitamin B12 supplementation
The much larger, headline-grabbing numbers associated with cagrilintide in the press figures in the low-to-mid 20% range come from Phase 3 trials of CagriSema , the combination with semaglutide, and are company-reported topline results, not standalone-cagrilintide data and not the peer-reviewed Phase 2 result cited above
Pros: Inexpensive, widely available