Route of Elimination Following a single intravenous dose, 73.1 +/- 16% of the dose was excreted in the urine during the 0-24 hour interval
van der Zwet WC, Kaiser AM, van Elburg RM, Berkhof J, Fetter WP, Parlevliet GA, et al
IGF-1 LR3: mechanism and evidence base IGF-1 LR3 (insulin-like growth factor 1 long arginine 3) is an 83-amino-acid synthetic analogue of human IGF-1 in which glutamic acid at position 3 is replaced with arginine and an additional 13-amino-acid extension is appended to the N-terminus
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(PubMed) Hutson JR, Stade B, Lehotay DC, Collier CP, Kapur BM