Bremelanotide vs IGF-1 LR3
Head-to-head comparison of Bremelanotide (Bremelanotide (PT-141), cyclic melanocortin receptor agonist) and IGF-1 LR3 (Insulin-like Growth Factor-1 Long R3) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Bremelanotide | IGF-1 LR3 |
|---|---|---|
| Category | Sexual Health | Performance |
| Full Name | Bremelanotide (PT-141), cyclic melanocortin receptor agonist | Insulin-like Growth Factor-1 Long R3 |
| Molecular Weight | 1025.2 Da | 9,117 Da |
| Half-Life | about 2.7 h | ~20-30 hours |
| Amino Acids | 7 | 83 |
| Typical Dose | 1.75 mg | 20-100 mcg |
| Route | Subcutaneous | IM / SC |
| Purity | ≥98% | — |
| Studies Count | 200 | 298 |
| Research Status | Clinical | Pre-clinical |
Bremelanotide Benefits
- ✓increases sexual desire
- ✓supports arousal
- ✓may improve erectile response
- ✓on-demand use
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
Bremelanotide Dosing
1.75 mg subcutaneous PRN|administer about 45 minutes before activity|max 1 dose per 24 hours
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
Bremelanotide Side Effects
- ⚠nausea
- ⚠flushing
- ⚠headache
- ⚠transient blood pressure increase
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
Bremelanotide
Human studies and approval data support meaningful effects on sexual desire in women, with a central mechanism involving melanocortin signaling. It is one of the most clinically relevant peptides in this category and is commonly used as the reference compound for PT-141-type research.
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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