HGH Fragment 176-191 vs Orexin-A
Head-to-head comparison of HGH Fragment 176-191 (Human Growth Hormone Fragment 176-191) and Orexin-A (Hypocretin-1 (Orexin-A)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | HGH Fragment 176-191 | Orexin-A |
|---|---|---|
| Category | Weight Management | Cognitive Enhancement |
| Full Name | Human Growth Hormone Fragment 176-191 | Hypocretin-1 (Orexin-A) |
| Molecular Weight | 1817.12 g/mol | 3562 Da |
| Half-Life | ~30 minutes | Minutes to <1 hour |
| Amino Acids | 16 | 33 |
| Typical Dose | — | Research-only; no validated human dose |
| Route | — | Intracerebroventricular/Intranasal |
| Purity | >98% | ≥98% |
| Studies Count | 45 | 42 |
| Research Status | Active Research | Pre-clinical |
HGH Fragment 176-191 Benefits
- ✓Targeted fat loss, no blood sugar impact, no IGF-1 elevation, inhibits lipogenesis, stimulates lipolysis, improved body composition
Orexin-A Benefits
- ✓wakefulness
- ✓attention
- ✓memory consolidation
- ✓fatigue resistance
HGH Fragment 176-191 Dosing
250-500 mcg subcutaneously 1-2 times daily on empty stomach. 12-16 week cycles typical in research.
Orexin-A Dosing
Research-only i.c.v. microgram/nanomolar studies|intranasal experimental use|no established human protocol
HGH Fragment 176-191 Side Effects
- ⚠Injection site irritation, headache, drowsiness. Does not affect blood sugar, insulin sensitivity, or elevate IGF-1.
Orexin-A Side Effects
- ⚠insomnia
- ⚠headache
- ⚠blood pressure changes
Research Overview
HGH Fragment 176-191
This 16-amino-acid fragment specifically targets adipose tissue via beta-3 adrenergic receptors. Works through a GH-receptor-independent pathway, explaining selective fat-loss properties without growth-promoting effects.
Orexin-A
Preclinical studies link orexin signaling to arousal, learning, and memory consolidation, making orexin-A a candidate for cognition-related research. It is not an approved cognitive enhancer and remains an experimental peptide.
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