insulin vs igf-1 lr3

insulin (F-tier) vs igf-1 lr3 (F-tier). mechanism, trials, evidence boundaries, dosing literature. side-by-side reference.

insulin · tier F

Insulin is the peptide hormone that controls blood glucose and an essential diabetes medicine. Bodybuilders use it hoping to drive nutrients into muscle, but controlled human work shows less muscle-protein breakdown, not a continuing rise in muscle-protein synthesis.

For diabetes, insulin is established and lifesaving. For muscle gain in healthy people, the reviewed PubMed and ClinicalTrials.gov searches found no controlled efficacy trial. Human mechanism studies show reduced protein breakdown, not unlimited synthesis, while severe hypoglycemia is immediate and documented.

0 located controlled healthy-person physique trials · half-life product and route specific; the Humulin R label reports different apparent half-lives after subcutaneous and intravenous administration · growth hormone

igf-1 lr3 · tier F

a free-circulating IGF-1 analog for muscle growth. sustained IGF-1 elevation carries one of the clearer cancer-risk signals in the literature.

a free-circulating IGF-1 analog. anabolic signal is real; sustained IGF-1 elevation carries one of the clearer cancer-risk signals in the literature.

WADA S2 banned in sport · half-life ~1-2 hours, estimated (no human PK); NOT long-acting, LR3 escapes the IGF-binding proteins that give complex-bound native IGF-1 its ~12-15h half-life · growth hormone

at a glance

• insulin: tier F · 0 located controlled healthy-person physique trials
• igf-1 lr3: tier F · WADA S2 banned in sport

reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.