Tesamorelin is one of the few research peptides with an FDA-approved counterpart, which lists at roughly $3,000 per month. Research-grade tesamorelin drops that to $120-300/month, but the price gap cuts both ways: it's also the peptide most commonly counterfeited with cheaper sermorelin or CJC-1295 dressed up as tesamorelin. Vendor selection is the entire game.
Research-context information only. Tesamorelin is the active ingredient in an FDA-approved product for HIV-associated lipodystrophy only; off-label and research-peptide use is not FDA-approved. Pricing and vendor information below relates to research-grade product sold for laboratory use. Possession or use of unapproved drugs outside an authorized clinical setting may be illegal in your jurisdiction. Consult a licensed physician for personal medical decisions.
This guide covers documented per-milligram pricing, which vial size matches a 1 mg/day or 2 mg/day protocol used in published research, how a tesamorelin COA is typically read, and the red flags that distinguish legitimate suppliers from relabelers. For dosing itself, see the tesamorelin dosing guide.
This is not a ranked vendor list — for that, see our Best Tesamorelin Vendors comparison. This guide describes how vendor evaluation is typically performed.
Understanding Tesamorelin Pricing
Tesamorelin is sold as a lyophilized (freeze-dried) powder in sealed glass vials. Three factors drive the price you pay: vial size (bigger = cheaper per mg), vendor markup, and whether the vendor invests in third-party COAs with mass spec. Because tesamorelin is structurally similar to sermorelin, skipping mass spec verification is the single cheapest way for a vendor to cut costs — and it's how counterfeits enter the market.
Current Market Pricing (2026)
| Vial Size | Typical Price Range | Price Per mg | Best For |
|---|---|---|---|
| 2 mg | $28-45 | $14-22/mg | Tolerance testing only — worst value |
| 5 mg | $35-75 | $7-15/mg | Short trial protocols, half-dose users |
| 10 mg | $60-150 | $6-15/mg | Standard 1-2 mg/day — best all-around |
| 10 mg × 10 (kit) | $495-855 | $4.27-8.55/mg | Full 16-week cycle, committed users |
The pattern documented in vendor catalogs: 10mg vials are the most-cited size for cost efficiency. 2mg vials carry the highest per-mg cost — typically 2-3x higher than 10mg. Multi-vial kits from vendors like Glacier Aminos drop per-mg cost to the $4.27/mg floor, generally referenced as appropriate after compound tolerance has been established.
Cheapest single-vial option: Glacier Aminos's 10% off drops the 20mg vial to $102.59 ($5.13/mg effective) — the lowest effective price we track for buying one vial. Get the code →
Cost Per Week at Common Doses
| Daily Dose | Monthly Cost (10mg single) | Monthly Cost (10mg kit) | Savings |
|---|---|---|---|
| 1 mg/day, 5-on/2-off (~20 mg/mo) | $132-300/month | $85-170/month | ~35-45% |
| 2 mg/day (Phase III, ~60 mg/mo) | $396-900/month | $255-510/month | ~35-45% |
| 1 mg/day continuous (~30 mg/mo) | $198-450/month | $128-255/month | ~35-45% |
For current vendor-specific pricing with exact $/mg breakdowns, see our Best Tesamorelin Vendors comparison and the tesamorelin cost per vial breakdown.
How to Verify Tesamorelin Quality
Tesamorelin is a 44-amino-acid GHRH analog with a trans-3-hexenoic acid modification at the N-terminus. That modification increases metabolic stability and is the structural feature that distinguishes tesamorelin from native GHRH and from sermorelin. Without mass spec, identifying tesamorelin versus a cheaper GHRH analog in a tesamorelin-labeled vial is not possible.
What a COA (Certificate of Analysis) Should Include
Identity Confirmation
- Mass spectrometry confirming the correct molecular weight (5,196 Da for tesamorelin)
- Amino acid sequence verification — the 44-residue sequence should match GHRH(1-44) with the hexenoyl N-terminal modification
- This is the single most important test for tesamorelin because sermorelin (GHRH 1-29) and CJC-1295 are common substitutes
Purity Testing
- HPLC purity — look for 98%+ purity
- The HPLC chromatogram should show a single dominant peak with minimal secondary peaks
- Water content (Karl Fischer) should be under 8% for proper lyophilization
Contamination Testing
- Endotoxin levels (bacterial contamination)
- Residual solvent analysis (acetonitrile, TFA)
- Heavy metals screening
How to Verify a COA Is Legitimate
Not all COAs are real. Some vendors have been documented photoshopping results or reusing old certificates from unrelated batches. Standard COA verification practices include:
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The testing lab — Reputable labs cited in community discussions include Janoshik Analytical, MZ Biolabs, and Colmaric Analyticals. Vendors offering only "in-house" testing are commonly flagged as a red flag.
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Lab-website verification — Janoshik COAs carry a task number that can be looked up directly at janoshik.com. Vendors that won't provide a verifiable task number are widely considered a red flag.
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Date — COAs are typically expected to be recent (within 6 months). Older COAs may not represent the current batch.
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Batch match — The batch/lot number on the COA should match what's printed on the vial.
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5,196 Da mass confirmation — Mass spec results showing ~3,358 Da indicate sermorelin. Results showing ~3,647 Da indicate CJC-1295 without DAC. Tesamorelin is uniquely heavier due to the 44-residue length plus hexenoyl modification.
Red Flags to Avoid
- No COA available — any vendor unwilling to provide testing results is not worth the risk
- Only in-house testing — self-reported purity numbers are meaningless without independent verification
- Prices significantly below market — tesamorelin below $4/mg across every size is almost certainly relabeled sermorelin
- COA doesn't show mass spec — for tesamorelin specifically, HPLC alone is not enough; mass spec is required to confirm identity
- Vendor can't explain the hexenoyl modification — a legitimate supplier knows why tesamorelin costs more to synthesize than sermorelin
- No contact information or cryptocurrency only — legitimate vendors have real customer service and accept standard rails (card, ACH, Zelle)
- No return or reship policy — reputable vendors stand behind their products
