red urine after vitamin b12 injection is from Does a B12 shot change urine color to pinkish? Seeing Red: Do B12 Injections
Description
The peptide does not appear to affect levels of insulin or IGF1 in studies thus far

With the rapid weight reduction caused by GLP-1 agonists, 25 to 40 % of the loss is lean mass (muscle tissue)
doi: 10.1007/978-1-61779-430-8_27

For ampoules, it's simplerjust insert the needle and pull back the plunger to withdraw your dose (typically 1 ml)