hCG vs Kisspeptin-54
Head-to-head comparison of hCG (Human Chorionic Gonadotropin) and Kisspeptin-54 (Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | hCG | Kisspeptin-54 |
|---|---|---|
| Category | Sexual Health | Sexual Health |
| Full Name | Human Chorionic Gonadotropin | Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment |
| Molecular Weight | 36,700 Da | 5.9 kDa |
| Half-Life | ~24-36 hours | about 20-30 min |
| Amino Acids | N/A | 54 |
| Typical Dose | 500-2,000 IU per dose | 0.3-1.0 nmol/kg |
| Route | Subcutaneous/Intramuscular | Intravenous |
| Purity | ≥98% | ≥98% |
| Studies Count | 2000 | 110 |
| Research Status | Clinical | Clinical |
hCG Benefits
- ✓stimulates endogenous testosterone
- ✓supports spermatogenesis
- ✓preserves testicular volume
- ✓may improve fertility markers
Kisspeptin-54 Benefits
- ✓GnRH/LH stimulation
- ✓supports sex hormone signaling
- ✓may enhance sexual motivation
- ✓fertility-axis modulation
hCG Dosing
500-2,000 IU SC/IM 2-3x weekly|1,500-3,000 IU weekly in fertility protocols|titrate to testosterone, estradiol, and semen parameters
Kisspeptin-54 Dosing
0.3-1.0 nmol/kg IV bolus|single-dose experimental protocols|research-only endocrine monitoring
hCG Side Effects
- ⚠acne
- ⚠gynecomastia
- ⚠water retention
Kisspeptin-54 Side Effects
- ⚠flushing
- ⚠nausea
- ⚠headache
- ⚠hormonal shifts
Research Overview
hCG
Human studies show hCG can raise intratesticular and serum testosterone by mimicking luteinizing hormone at the testis. It is commonly studied in male hypogonadism and fertility-preservation settings.
Kisspeptin-54
Human studies show that kisspeptin-54 can acutely modulate reproductive neuroendocrine signaling, which makes it relevant to libido and sexual motivation research. Its effects are indirect compared with PT-141, but it is a well-established peptide in the scientific literature.
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