Each appointment, even for a quick injection, requires a nurses time, a consultation room, and administrative handling
Delivery is also prompt, typically arriving within 5 to 10 days of placing an order
What they do not have is a body of controlled evidence showing that injecting them causes clinically significant weight loss independent of diet, exercise, and the rest of a supervised program
Oral B12 looks cheap, but if your body absorbs very little of each pill because of low stomach acid or a gut condition, much of that spending does not translate into results, and you keep buying bottle after bottle
In published studies, the fragment has not demonstrated meaningful impact on blood glucose, insulin sensitivity, or IGF-1 concentrations at research-relevant doses
Lastly, choline has also been shown to specifically aid with memory, and to support the maintenance of a healthy nervous system