Is there human research on IGF-1 LR3?
No. This site's review found animal studies on muscle growth and muscle stem cells, but no published study in people. That gap is the honest answer if you are asking whether its effects in animals hold up in people. As of this review, they have not been tested in a published study in people.
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.