igf-1 lr3 promotes muscle hypertrophy Recombinant Human IGF-I/IGF-1 GMP Protein, CF 8335D-GMP: R&D Systems Arencia Vitamin C 95ml Select Your Set:8 oz Liquid + 70/30 Aloe Roll-On Renal or Hepatic Impairment

igf-1 lr3 promotes muscle hypertrophy Recombinant Human IGF-I/IGF-1 GMP Protein, CF 8335D-GMP: R&D Systems Arencia Vitamin C 95ml Select Your Set:8 oz Liquid + 70/30 Aloe Roll-On Renal or Hepatic Impairment

Renal or Hepatic Impairment Does Not Affect Pharmacokinetics, Safety, or Tolerability of Subcutaneous Cagrilintide | Clinical Pharmacokinetics | Springer Nature Link

One further study used the palmitoylated copper form, which is a different molecule again

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Clinicians often track IGF-1 as a biomarker of GH activity, targeting age-appropriate increases rather than supraphysiological levels.