PepsTracker › Blog › Cheapest Semaglutide 2026
Last updated: June 09, 2026 · 13 vendors tracked · Prices updated daily
pepstracker for 5% offSemaglutide is a GLP-1 receptor agonist — GLP-1 receptor agonist widely studied for metabolic and glycemic research. It has become one of the most sought-after research peptides for studying obesity and type 2 diabetes pathways. The table below compares all 13 vendors we track, sorted by cost-per-mg after applying discount codes. All products are for research use only.
| # | Vendor | Size | List Price | After Discount | $/mg | Code | Buy |
|---|---|---|---|---|---|---|---|
| 🥇 | Reta One Labs | 10.0mg | $29.00 | $27.55 | $2.75/mg | pepstracker | Shop → |
| 🥈 | AtomiK Labz | 10.0mg | $45.00 | $38.25 | $3.83/mg | Glowlab15 | Shop → |
| 🥉 | EZ Peptides | 10.0mg | $48.00 | $43.20 | $4.32/mg | GlowLab | Shop → |
| #4 | Glacier Aminos | 15.0mg | $74.99 | $67.49 | $4.50/mg | Glowlab | Shop → |
| #5 | Puratek Peptides | 5.0mg | $24.95 | $24.95 | $4.99/mg | pepstracker | Shop → |
| #6 | NuraPeptide | 10.0mg | $69.00 | $58.65 | $5.87/mg | pepstracker | Shop → |
| #7 | Fusion Peptide 🎁 BOGO | 5.0mg | $36.49 | $31.02 | $6.20/mg | pepstracker | Shop → |
| #8 | Mile High Compound | 10.0mg | $69.99 | $62.99 | $6.30/mg | Glowlab | Shop → |
| #9 | AMP Ameano Peptides | 5.0mg | $35.00 | $31.50 | $6.30/mg | pepstracker | Shop → |
| #10 | Ion Peptides | 5.0mg | $39.00 | $33.15 | $6.63/mg | Glowlab | Shop → |
| #11 | Inno Amino | 10.0mg | $79.99 | $67.99 | $6.80/mg | pepstracker | Shop → |
| #12 | GLP-1 Research Lab | 10.0mg | $75.32 | $75.32 | $7.53/mg | link only | Shop → |
| #13 | LA Peptides | 5.0mg | $64.99 | $58.49 | $11.70/mg | pepstracker | Shop → |
Vendors sell different vial sizes — comparing sticker prices is misleading. A $30 vial of 5mg works out to $6.00/mg, while a $55 vial of 10mg is only $5.50/mg. The $55 option is actually cheaper per unit of research material.
📐 Formula: Discounted price ÷ mg = cost per mg
Example: $45 after discount ÷ 10mg = $4.50/mg. The table above calculates this automatically for every vendor, so you can compare apples to apples instantly.
When evaluating vendors for Semaglutide, also check for: Certificate of Analysis (COA) availability, third-party HPLC or mass spectrometry verification, US-based shipping if timing is important, and responsive customer support.
Reta One Labs lists Semaglutide at $29.00 for 10.0mg. Apply 5% off with code pepstracker to bring your price to $27.55 — $2.75 per milligram.
AtomiK Labz lists Semaglutide at $45.00 for 10.0mg. Apply 15% off with code Glowlab15 to bring your price to $38.25 — $3.83 per milligram.
EZ Peptides lists Semaglutide at $48.00 for 10.0mg. Apply 10% off with code GlowLab to bring your price to $43.20 — $4.32 per milligram.
Glacier Aminos lists Semaglutide at $74.99 for 15.0mg. Apply 10% off with code Glowlab to bring your price to $67.49 — $4.50 per milligram.
Puratek Peptides lists Semaglutide at $24.95 for 5.0mg. Apply 0% off with code pepstracker to bring your price to $24.95 — $4.99 per milligram.
Semaglutide is a GLP-1 (glucagon-like peptide-1) receptor agonist that mimics the incretin hormone your gut naturally releases after eating. Originally developed by Novo Nordisk, it was first approved for type 2 diabetes research before attracting massive attention for metabolic research applications. As a research compound, it is one of the most studied peptides of the past decade, with thousands of peer-reviewed studies examining its mechanisms of action on the hypothalamus, pancreatic beta cells, gastric emptying, and lipid metabolism. The compound works by binding to and activating GLP-1 receptors throughout the body. In the brain, it suppresses appetite signals in the hypothalamus. In the pancreas, it stimulates insulin secretion in a glucose-dependent manner. In the gut, it slows gastric emptying — all of which makes it an extraordinarily interesting compound for researchers studying metabolic pathways.
Several factors determine why semaglutide pricing varies so dramatically across vendors: **Synthesis complexity**: Semaglutide is a 31-amino acid peptide with a fatty acid chain modification that allows once-weekly dosing. The C18 fatty diacid linker is technically challenging to attach correctly, and purity varies significantly between manufacturers. **Third-party testing costs**: Responsible vendors spend $500–2,000 per batch on HPLC and mass spectrometry verification. These costs get passed to customers but represent genuine quality assurance. **Vial size economics**: Vendors selling 10mg vials benefit from bulk synthesis. Per-mg costs drop dramatically at larger scales — which is why a 10mg vial often has a better $/mg ratio than two 5mg vials. **Import chain**: Most peptide raw materials are synthesized in China or India before being lyophilized and QC'd in the US. Vendors with direct manufacturer relationships cut out intermediaries and pass savings on.
When evaluating a semaglutide vendor, verify these factors before purchasing: **Certificate of Analysis (COA)**: Request the most recent batch test showing purity by HPLC (≥98% is the standard for research grade). Be wary of vendors showing old or undated COAs. **Endotoxin testing**: LAL (Limulus Amebocyte Lysate) endotoxin testing matters for research applications. Quality vendors publish these results alongside their purity data. **Reconstitution instructions**: Quality vendors provide clear guidance on using bacteriostatic water for reconstitution. Most semaglutide is shipped lyophilized (freeze-dried) and must be reconstituted before use. **Packaging and cold chain**: Semaglutide should be stored at 2–8°C when reconstituted. Check how vendors handle shipping in warm months — proper cold packs are a signal of seriousness about product integrity.
**Semaglutide vs Tirzepatide** Tirzepatide adds GIP receptor agonism on top of GLP-1, which research suggests creates a more powerful metabolic effect. However, tirzepatide is also typically more expensive — $3.09/mg at best vs semaglutide's $2.75/mg at the current cheapest vendor. **Semaglutide vs Retatrutide** Retatrutide is the newest compound in this class, adding glucagon receptor agonism to GLP-1 and GIP. Clinical trial data has shown extraordinary results, but the research compound is significantly more expensive at $4.50/mg at best. For researchers already studying semaglutide, retatrutide represents the next frontier. **Oral vs Injectable Semaglutide** Most research peptide vendors sell injectable lyophilized semaglutide. Note that some vendors are beginning to offer oral semaglutide — the mechanisms differ significantly (oral absorption involves SNAC co-administration) and this should be considered when designing research protocols.
Based on our current data across 13 vendors, Reta One Labs currently offers the best cost-per-mg — $2.75/mg when you use code pepstracker. Always compare $/mg rather than sticker price since vial sizes vary significantly.
Price variation reflects batch size, synthesis purity, third-party testing costs, and shipping infrastructure. Cheaper doesn't always mean lower quality — some vendors simply operate more efficiently. That said, always verify a Certificate of Analysis (COA) before purchasing from any vendor.
Divide the discounted price by the milligrams per vial. Example: $50 for 10mg = $5.00/mg, while $35 for 5mg = $7.00/mg. The $50 option is cheaper per unit even though the upfront cost is higher. Our table above handles this calculation automatically.
Yes — all discount codes are affiliate codes we maintain with each vendor. Apply the code at checkout or click our Shop link which may apply it automatically. Codes are verified regularly but prices and availability can change — always confirm at checkout.
Our comparison tool shows current pricing across all 13 vendors with discount codes already applied — updated every day.
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