What does IGF-1 LR3 stand for?
IGF-1 stands for Insulin-like Growth Factor 1. LR3 names the Long R3 change: one amino acid is swapped for arginine and a short piece is added to one end, so the proteins that normally grab IGF-1 hold onto it less. This site's profile lists the full name as Long R3 Insulin-like Growth Factor 1, a half-life of about 20 to 30 hours, and a molecular weight of 9,111 daltons. This site's review found no published study in people. The letters describe a chemical change, not an approval. This FAQ does not invent a human muscle result. The studies on that page are animal work, including one in rats given a steroid drug (dexamethasone), where it was 2.5-fold stronger than natural IGF-I. Full record at /compounds/igf-1-lr3.
Studies in people from the compound pages this answer belongs to
Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.
Part of growth hormone secretagogues. Sermorelin, tesamorelin, ipamorelin, CJC-1295, and the rest of the GHRH and ghrelin receptor family.