AOD-9604vsP21
AOD-9604 vs P21 — independent comparison of uses, administration, pricing across providers, and key differences. Last reviewed April 21, 2026.
Quick Verdict
Based on clinical evidence and real patient data
A modified fragment (amino acids 176-191) of human growth hormone designed to stimulate fat metabolism without the growth-promoting effects of full HGH. Studied as a targeted fat-loss peptide.
A 21-amino-acid peptide that mimics the action of ciliary neurotrophic factor (CNTF). Studied for neurogenesis, cognitive improvement, and neuroprotection. Shows promise in animal models for enhancing memory consolidation and protecting against neurodegenerative decline.
Best choice depends on your insurance, budget, and treatment history.Take the quiz to get a personalized recommendation.
AOD-9604 vs P21: At a Glance
Full comparison across all key factors.
| Factor | AOD-9604ALLY PICK | P21 |
|---|---|---|
| Category | weight-loss | cognitive |
| Also Known As | Anti-Obesity Drug 9604 | CNTF analog, Colostrinin fragment |
| Administration | Subcutaneous injection | Intranasal spray |
| Prescription | Required | Required |
| Providers | 4 providers✓ Better | 3 providers |
| Common Uses |
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Data sourced from FDA prescribing information and peer-reviewed clinical trials. Prices reflect telehealth platform costs as of April 21, 2026. See our methodology.
Pricing by Provider
2 providers offer both AOD-9604 and P21.
| Provider | AOD-9604 | P21 | Consultation | Lab Testing |
|---|---|---|---|---|
 | $160/monthly | $180/monthly | Video Telehealth | Yes |
 | $220/monthly | $230/monthly | Video Telehealth | Yes |
 | Not offered | $55/one-time | Async Telehealth | No |
 | $185/monthly | Not offered | Video Telehealth | Yes |
 | $150/monthly | Not offered | Video Telehealth | No |
Key Differences
AOD-9604
More ProvidersA modified fragment (amino acids 176-191) of human growth hormone designed to stimulate fat metabolism without the growth-promoting effects of full HGH. Studied as a targeted fat-loss peptide.
P21
A 21-amino-acid peptide that mimics the action of ciliary neurotrophic factor (CNTF). Studied for neurogenesis, cognitive improvement, and neuroprotection. Shows promise in animal models for enhancing memory consolidation and protecting against neurodegenerative decline.
Which Is Right for You?
Choose AOD-9604if…
- You want a weight-loss medication
- You prefer subcutaneous injection administration
- You want more provider options (4 available)
- Your primary goal is fat metabolism
- Your primary goal is body composition
Choose P21if…
- You want a cognitive medication
- You prefer intranasal spray administration
- 3 providers available on our platform
- Your primary goal is neurogenesis
- Your primary goal is memory consolidation
Frequently Asked Questions
What is the difference between AOD-9604 and P21?
Which is cheaper, AOD-9604 or P21?
Can I switch from AOD-9604 to P21?
Medical Disclaimer
This comparison is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting, stopping, or changing any medication. Individual results may vary. The information presented reflects publicly available data and may not account for your specific health situation.