Labs are not required to start since there is no standard peptide deficiency test

Do Not Use Semaglutide If You: Have a personal or family history of medullary thyroid carcinoma (MTC) Have Multiple Endocrine Neoplasia syndrome type 2 (MEN-2) Are pregnant, planning to become pregnant, or breastfeeding Have a history of pancreatitis or unexplained, persistent abdominal pain Have severe gastrointestinal disease (including gastroparesis) Have had an allergic reaction to semaglutide or any of its components Use With Caution If You Have: Gallbladder disease or a history of gallstones Kidney or liver impairment Diabetic retinopathy High triglyceride levels Frequent gastrointestinal issues such as reflux, nausea, or vomiting A history of alcohol use disorder Possible Side Effects May Include: Mild to moderate nausea, vomiting, diarrhea, or constipation Bloating or decreased appetite Fatigue or dizziness In rare cases, pancreatitis (inflammation of the pancreas) symptoms may include severe, persistent abdominal pain radiating to the back, sometimes with nausea or vomiting

CL Answer I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels
Lyophilized (freeze-dried) peptide remains stable for extended periods at room temperature or longer when refrigerated
BPC-157 can sometimes make you feel sick, give you headaches, or upset your stomach