This action makes these agents a therapeutic option for weight loss.56 Although to a lesser extent, delay in gastric emptying contributes to the anorexigenic effect.61 Clinical trials conducted with GLP-1 receptor agonists in patients with obesity (or excess weight [BMI 27] with comorbidities), or with DT2 and excess weight or obesity, have achieved weight reductions greater than those reported for orlistat, as well as those observed with oral antidiabetic agents such as the sodium glucose type 2 cotransporter inhibitors (SGLT2i) or metformin.62 In a meta-analysis of more than 10 000 patients with obesity, those treated with GLP-1 receptor agonists lost, on average, 7kg more than those in the control group.63 Weight loss of up to 15% has been observed after 12 months of treatment,64,65 a level that had only been achieved through surgical methods

Note: If you find these drugs for much cheaper and there is not a physician involved in your treatment, I would be very leery of the safety and efficacy of what you are purchasing
You can also view the prescribing information for Ozempic subcutaneous injection and oral tablet
10.3390/jcm6060060 J Clin Med
Don't forget to consult your healthcare provider to determine if B12 injections are appropriate for you and to discuss the optimal dosage and frequency tailored to your individual needs