Kisspeptin-10 vs IGF-1 LR3
Head-to-head comparison of Kisspeptin-10 (Metastin 45-54 (KiSS-1 Fragment)) and IGF-1 LR3 (Insulin-like Growth Factor-1 Long R3) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Kisspeptin-10 | IGF-1 LR3 |
|---|---|---|
| Category | Performance | Performance |
| Full Name | Metastin 45-54 (KiSS-1 Fragment) | Insulin-like Growth Factor-1 Long R3 |
| Molecular Weight | 1,302.41 Da | 9,117 Da |
| Half-Life | ~4 minutes | ~20-30 hours |
| Amino Acids | 10 | 83 |
| Typical Dose | 100-500 mcg | 20-100 mcg |
| Route | SC / IV | IM / SC |
| Purity | — | — |
| Studies Count | 156 | 298 |
| Research Status | Clinical Trials | Pre-clinical |
Kisspeptin-10 Benefits
- ✓Stimulates natural testosterone production
- ✓Activates GnRH release
- ✓Increases LH and FSH
- ✓Does not suppress HPG axis
- ✓May restore fertility
IGF-1 LR3 Benefits
- ✓Promotes muscle hyperplasia (new muscle cells)
- ✓Extended half-life vs native IGF-1
- ✓Enhanced protein synthesis
- ✓Improved nutrient partitioning
- ✓Anti-catabolic effects
Kisspeptin-10 Dosing
Standard: 100-500 mcg SC daily|Hormone Optimization: 200 mcg SC twice daily|PCT Support: 300 mcg SC daily for 2-4 weeks|Research typically uses IV infusion in clinical settings
IGF-1 LR3 Dosing
Standard: 20-50 mcg IM post-workout|Advanced: 50-100 mcg IM or SC daily|Cycle: 4-6 weeks on, 4 weeks off
Kisspeptin-10 Side Effects
- ⚠Common (Mild): Injection site discomfort, mild flushing
- ⚠Rare: Temporary mood changes, headache
- ⚠Well tolerated in clinical studies
- ⚠Does not cause HPG axis suppression
IGF-1 LR3 Side Effects
- ⚠Common: Hypoglycemia (dose-dependent), joint pain, water retention
- ⚠Moderate: Gut growth concern (high doses), acromegaly-like symptoms
- ⚠Serious: Theoretical cancer risk (prolonged high-dose use)
Research Overview
Kisspeptin-10
Kisspeptin-10 has growing clinical evidence. Multiple human studies demonstrate reliable GnRH stimulation and subsequent testosterone increase. Being actively studied for reproductive medicine, including IVF protocols and hypogonadism. Unique advantage of not suppressing the HPG axis.
IGF-1 LR3
IGF-1 LR3 has extensive in vitro and animal data. Its role in muscle hyperplasia is well-documented. The extended half-life modification provides practical advantages over native IGF-1.
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