Understand the source comparison
What's the Difference Between IGF-1 LR3 and IGF1 LR3: Notation Comparison
IGF-1 LR3 Long R3 Insulin-Like Growth Factor-1 83 amino acids 20–30 hours Sustained receptor activation in vitro ~100× lower than native IGF-1 Hyphenated notation. Same peptide as IGF1 LR3 IGF1 LR3 Non-hyphenated notation. Same peptide as IGF-1 LR3 Native IGF-
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This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- IGF-1 LR3
- Long R3 Insulin-Like Growth Factor-1
- 83 amino acids
- 20–30 hours
- Sustained receptor activation in vitro
- ~100× lower than native IGF-1
- Hyphenated notation. Same peptide as IGF1 LR3
- IGF1 LR3
- Non-hyphenated notation. Same peptide as IGF-1 LR3
- Native IGF-1
- Insulin-Like Growth Factor-1
- 70 amino acids
- 10–12 minutes
- Physiological signaling studies
- High (normal IGFBP-3 binding)
- Endogenous form. Structurally distinct from LR3 variants
- rhIGF-1
- Recombinant Human IGF-1
- Replacement therapy models
- Identical to native IGF-1, produced via recombinant synthesis