[4,6] Studies show increased collagen synthesis, improved tendon-to-bone healing, and faster recovery from transection injuries
2011 Aug;94(8):4016-27
If you need to lose in excess of 15 pounds, consider the medically-supervised weight loss program
According to the National Institutes of Health, your body can store up to 2,000 times the amount of B12 you typically get in a day

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

Since IV infusions often combine B12 with complementary nutrients, the broader formulation can occasionally introduce sensitivities that a standalone B12 shot would not