Semaglutide is the most in-demand research peptide right now, driven by its role as a GLP-1 receptor agonist in weight management research. With prices ranging from $3/mg to $20+/mg across vendors, knowing where to buy matters.
We pulled pricing data from our database of 20 vendors and cross-referenced it with purity verification data. Here's what the numbers show.
Current Semaglutide Pricing (March 2026)
Prices vary dramatically by vendor, dosage size, and whether the product is lyophilized powder or pre-mixed:
| Vendor | Size | Price | Price/mg | Finnrick |
|---|---|---|---|---|
| Paradigm Peptides | 10mg | $30.00 | $3.00/mg | A |
| Soma Chems | 10mg | $35.99 | $3.60/mg | - |
| Peptide Crafters | 10mg | $42.99 | $4.30/mg | A |
| Polaris Peptides | 10mg | $44.99 | $4.50/mg | A |
| Skye Peptides | 10mg | $44.99 | $4.50/mg | A |
| Swiss Chems | 10mg | $49.99 | $5.00/mg | - |
| Peptide Sciences | 5mg | $52.00 | $10.40/mg | - |
| Astro Peptides | 10mg | $75.00 | $7.50/mg | A |
Prices are pulled from our database and may have changed since last scrape. Check individual [vendor pages](/vendors) for current pricing.
What to Look for in a Semaglutide Source
Purity Verification
Semaglutide is a complex 39-amino-acid peptide with a fatty acid modification. Synthesis is difficult, and lower-quality sources may contain:
- •Truncated sequences (missing amino acids)
- •Deletion peptides
- •Racemized amino acids
- •Residual solvents
A valid COA should show HPLC purity of 95%+ with mass spectrometry confirmation of the correct molecular weight (4,113.58 Da).
Finnrick Testing
Five vendors in our database carry Finnrick A ratings for semaglutide specifically: Paradigm Peptides, Polaris Peptides, Skye Peptides, Peptide Crafters, and Astro Peptides. Finnrick's independent testing confirms high purity — this is the strongest third-party verification available.
Form Factor
Most research semaglutide is sold as lyophilized powder requiring reconstitution with bacteriostatic water. Some vendors sell pre-mixed solutions, which are more convenient but may have shorter shelf life. Check the product form on each vendor's page.
Best Value: Price per mg
At $3.00/mg, Paradigm Peptides currently offers the lowest price per mg for semaglutide in our dataset, with the backing of a Finnrick A rating. Soma Chems at $3.60/mg is the cheapest option without Finnrick verification.
For verified purity at competitive prices, the sweet spot is in the $4-5/mg range with vendors like Peptide Crafters, Polaris, and Skye — all carrying Finnrick A ratings.
How Prices Compare to Other GLP-1 Peptides
For researchers comparing GLP-1 receptor agonists, here's how semaglutide stacks up against alternatives:
- •Semaglutide: $3-10/mg — most studied, longest acting
- •Tirzepatide: $5-15/mg — dual GIP/GLP-1 agonist, newer
- •Retatrutide: $9-20/mg — triple agonist (GLP-1/GIP/glucagon), newest
For detailed comparisons, see our [semaglutide vs tirzepatide](/compare/semaglutide-vs-tirzepatide) head-to-head analysis.
The Bottom Line
The semaglutide market has matured significantly. Prices have dropped as more vendors enter the space, and Finnrick testing has made purity verification more accessible. For research purposes, the best value is currently in the $3-5/mg range from Finnrick-verified vendors.
Use our [semaglutide compound page](/compounds/semaglutide) for real-time pricing across all vendors.
For research use only. Not for human consumption. Semaglutide is a research chemical. This is not medical advice.