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The peptide doesnt negatively affect carbohydrate metabolism

Over time, low B12 can also impact the appearance and health of your skinleading to dryness, hyperpigmentation, or delayed healing

PMID: 28189172 6 Intramuscular Cyanocobalamin Treatment in Patients with Corpus Atrophic Gastritis and Vitamin B12 Deficiency: Efficacy and Predictors of Increased Requirement-A Monocentric Longitudinal Real-Life Cohort Study

The main difference lies in their mechanism

IGF-1 treatment: future and limitations The FDA approved the use of rhIGF-1 (Mecasermin, Increlex) for treatment of severe primary IGF-1 deficiency in 2003

You should discuss your goals with your surgeon and have realistic expectations so that your surgeon can determine what is achievable with the procedure depending on your anatomy