A pharmacokinetic study in growth-hormone-deficient patients using a closely related long-acting IGF-1 preparation found a terminal half-life of 5.8 hours for free IGF-1 after subcutaneous dosing, though the exact value for the research-grade LR3 analogue varies by formulation [4]
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(PubMed) Zou Y, Liu Y, Li S
They tracked this degradation across different temperatures and found that warmth slowly chips away at the drug