LiraglutidevsP21
Liraglutide 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 GLP-1 receptor agonist administered daily for chronic weight management. FDA-approved as Saxenda for obesity and as Victoza for type 2 diabetes. One of the first GLP-1 medications widely used for weight loss before semaglutide.
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.
Liraglutide vs P21: At a Glance
Full comparison across all key factors.
| Factor | LiraglutideALLY PICK | P21 |
|---|---|---|
| Category | weight-loss | cognitive |
| Also Known As | Saxenda, Victoza | CNTF analog, Colostrinin fragment |
| Administration | Subcutaneous injection (daily) | Intranasal spray |
| Prescription | Required | Required |
| Providers | 4 providers✓ Better | 3 providers |
| Common Uses |
|
|
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
1 provider offers both Liraglutide and P21.
| Provider | Liraglutide | P21 | Consultation | Lab Testing |
|---|---|---|---|---|
 | $220/monthly | $180/monthly | Video Telehealth | Yes |
 | Not offered | $55/one-time | Async Telehealth | No |
 | $299/monthly | Not offered | Video Telehealth | Yes |
 | $250/monthly | Not offered | Video Telehealth | Yes |
 | $200/monthly | Not offered | Video Telehealth | No |
 | Not offered | $230/monthly | Video Telehealth | Yes |
Key Differences
Liraglutide
More ProvidersA GLP-1 receptor agonist administered daily for chronic weight management. FDA-approved as Saxenda for obesity and as Victoza for type 2 diabetes. One of the first GLP-1 medications widely used for weight loss before semaglutide.
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 Liraglutideif…
- You want a weight-loss medication
- You prefer subcutaneous injection (daily) administration
- You want more provider options (4 available)
- Your primary goal is weight loss
- Your primary goal is appetite suppression
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 Liraglutide and P21?
Which is cheaper, Liraglutide or P21?
Can I switch from Liraglutide 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.