BPC-157 works with standard bacteriostatic water
So it can be tough for a doctor to determine that vitamin B12 deficiency is the problem, unless youve taken a baseline test beforehand and already know that your B12 levels are lower than they should be
[6] Sigma-Aldrich SML2832 5-Amino-1-methylquinolinium iodide technical page

NICE-recommended weight management strategies include: Dietary intervention aiming for a 600 kcal/day deficit through reduced portion sizes, limiting energy-dense foods, and increasing fruit and vegetable consumption Physical activity building up to 150300 minutes of moderate-intensity aerobic activity weekly, plus muscle-strengthening activities on at least two days weekly, in line with UK Chief Medical Officers' guidelines [10] Behavioural approaches including self-monitoring, goal-setting, and addressing emotional eating patterns Commercial weight management programmes such as those meeting NICE quality standards (QS127) Very-low-calorie diets in specific circumstances, under clinical supervision and for limited periods For patients with a BMI 30 kg/m (or 27.5 kg/m in those of South Asian, Chinese, or other Asian family origin) who have not achieved adequate weight loss through lifestyle measures alone, pharmacological interventions may be considered

The 'MIC' part of the injection Methionine, Inositol, and Choline are nutrients that play a role in fat metabolism and liver health