Buying Guide··11 min read

Buy Tesamorelin Peptide: Compare 6 Vendors

Compare 6 Tesamorelin Peptide vendors: from $27.95 a vial, best value $5.45/mg. Codes save up to 50%. Vial sizes, COA status, cost per week.

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Where to Buy Tesamorelin

If you want to buy tesamorelin by the single vial, Nura Peptide is the cheapest at 10mg — $49.00 a vial (30% off with code thepeptidecatalog). At 20mg, a single vial runs $91.00 at Nura Peptide. Tesamorelin is one of the few research peptides with an FDA-approved counterpart, a separately regulated prescription product that lists at roughly $3,000 per month. Research-grade vendor pricing works out to roughly $120-300 a month at the community-reported 1 mg/day (laboratory-use product, not an FDA-regulated drug), 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.

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 Lowest price today (with code) Vendor Also sold by (price today)
5mg $25.00 ($5.00/mg) Ascension Peptides Ion Peptide $38.25
10mg $49.00 ($4.90/mg) Nura Peptide Ion Peptide $59.46 · EZ Peptides $61.20 · Mile High Compounds $71.99
20mg $91.00 ($4.55/mg) Nura Peptide Ion Peptide $92.65

Prices are single vials through our links, with each vendor's standing code or link discount applied.

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 bring the per-mg cost down further.

Single-vial value: Cheapest per mg today among the vendors we list: $4.55/mg, on Nura Peptide's 20mg vial at $91.00 (30% off with code thepeptidecatalog). Bigger vials cost less per mg, but a reconstituted vial is typically kept no longer than 28 days, so the lowest $/mg is not always the lowest cost for a small weekly amount.

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

COA verification process

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:

  1. 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.

  2. 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.

  3. Date — COAs are typically expected to be recent (within 6 months). Older COAs may not represent the current batch.

  4. Batch match — The batch/lot number on the COA should match what's printed on the vial.

  5. 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
CategoryGrowth & Repair Peptides
ClassGH secretagogue
GoalFat Loss
Tesamorelin research kit
Best Kit Deal10-VialCOASave 36%

Ion Peptide — 20mg × 10 (200mg) — $818 $695 with code thepeptidecatalog (15% off) ($3.47/mg)

Top Tesamorelin Vendors

Ranked by price, COA availability, and reputation

1
Nura PeptideCOA
10/10
$7.00/mg
2
Ascension PeptidesCOA
9.8/10
5mg$10.00/mg
3
Ion PeptideCOA
9.6/10
$7.00/mg
See full vendor rankings for Tesamorelin →

Choosing the Right Vial Size

Vial size comparison

The arithmetic below illustrates how long a vial lasts at doses reported in published and community sources; it is not a dosing instruction. Vial size selection isn't just about price — protocol duration must align with tesamorelin's reconstitution stability window, which is tighter than most peptides.

The 14-21 Day Stability Rule

Tesamorelin is less stable in solution than most research peptides. Reconstituted with bacteriostatic water and refrigerated, published stability data show 14-21 days — shorter than the 28 days documented for BPC-157 or retatrutide. Reconstituted with sterile water (no preservative), it drops to 24 hours. That creates a practical vial-size constraint. Vial-duration arithmetic at the doses reported in the Phase III trial (2 mg/day) and in community sources (1 mg/day):

Vial Size At 1 mg/day At 2 mg/day At 1 mg/day 5-on/2-off
2 mg 2 days 1 day 3 days
5 mg 5 days 2.5 days 7 days
10 mg 10 days 5 days 14 days

All cells above fall within the 14-21 day stability window — meaning 10mg is the largest vial size aligned with typical protocols. Anything larger (combined or pooled) risks degradation before use.

Documented practice: published stability data and community sources describe reconstituting one 10mg vial at a time and using it within 10-14 days, with remaining vials kept sealed and refrigerated in powder form. Lyophilized tesamorelin is documented as stable for 12+ months refrigerated.

Vial Size by Protocol

Tolerance testing context:

  • A single 5mg vial is the smallest unit commonly cited for compound tolerance assessment without committing to a larger supply
  • Typical use window is 5-7 days at standard doses

Standard 1 mg/day community protocol:

  • 10mg vial — at the community-reported 1 mg/day, a 10mg vial spans 10 days, inside the stability window
  • The most commonly purchased size in vendor data
  • 2-4 vials at a time covers a 20-40 day supply without reconstitution gaps

Phase III 2 mg/day protocol (Falutz et al. 2010):

  • 10mg vials in quantity — one vial every 5 days equates to ~6 vials per month
  • Kit deals (10x 10mg) drop per-mg cost meaningfully here
  • A full 16-week cycle requires roughly 16-24 vials at 4-6 vials/month

Buying Multiple Smaller vs One Large Kit

Factor Multiple Singles (e.g., 4× 10mg) Kit (1× 10× 10mg)
Cost per mg Higher ($6-15/mg) Lower ($4.27-8.55/mg)
Freshness Same (lyophilized storage equivalent) Same
Flexibility Can stop mid-cycle Committed to full supply
Storage Easier (smaller volumes) Requires dedicated fridge space
Shipping More frequent orders Single shipment

Common community pattern: community sources describe buying 2× 10mg singles first to check a new source, with kit purchases typically reserved for full 2 mg/day protocols or 12+ week cycles where the 10-pack saves 30-45% per mg.

Why Tesamorelin Costs More Than Sermorelin or CJC-1295

A common question in community discussions: why does tesamorelin run $6-10/mg when sermorelin sits at $2-4/mg and CJC-1295 is similar? Three reasons documented in the literature:

1. Clinical data depth. Tesamorelin has Phase III RCT data — a pooled analysis of 806 patients showing 15-18% visceral fat reduction at 26 weeks of 2 mg/day (Falutz et al. 2010). Sermorelin has no comparable trial data. CJC-1295 has never been tested in a human RCT for body composition.

2. Longer half-life via hexenoyl modification. The trans-3-hexenoic acid group at the N-terminus extends tesamorelin's half-life to ~26 minutes versus 11 minutes for native GHRH. That modification is harder to synthesize correctly, which is where the per-mg cost premium comes from.

3. Reported muscle-mass data. A 2019 trial reported that tesamorelin increased muscle cross-sectional area while reducing intramuscular fat (Stanley et al. 2019). Comparable trial data have not been published for sermorelin or CJC-1295.

When tesamorelin is paid for but mass spec shows sermorelin's weight (~3,358 Da), the result is a 3x markup for the cheaper peptide. The COA is the mechanism that surfaces this.

Pairing with Ipamorelin — Convenience vs Control

Some vendors sell a tesamorelin + ipamorelin blend in a single vial. The combination is mechanistically complementary — tesamorelin acts on the GHRH receptor while ipamorelin acts on the ghrelin receptor, and community and mechanistic sources describe a larger GH pulse than either alone. But blend vials have real trade-offs:

Pros of the blend:

  • One injection, one reconstitution step
  • Fixed ratio (10mg tesamorelin + 3mg ipamorelin, or 13mg + 3mg, among the vendors we track)

Cons of the blend:

  • Ratios cannot be adjusted independently — different tolerances for each compound cannot be accommodated
  • Side-effect attribution is harder when both compounds are co-dosed
  • COA complexity — vendors must verify both peptides are present at labeled concentrations

Reported community pattern: Initial cycles typically use tesamorelin and ipamorelin separately. Blends are more commonly cited for maintenance cycles after individual responses to each compound have been characterized.

Tesa/Ipa Blend (Tesamorelin + Ipamorelin) Prices

Tesa/Ipa is one lyophilized vial that combines tesamorelin, a GHRH analog, with ipamorelin, a ghrelin-receptor agonist; of the three vendors we track, two list it as 10mg tesamorelin + 3mg ipamorelin and Nura Peptide lists 13mg + 3mg.

Vendor Vial (tesamorelin + ipamorelin) List price With our code $/mg of blend (after code)
Nura Peptide 13mg + 3mg (16mg) $110.00 $77.00 (30% off) $4.81
Ion Peptide 10mg + 3mg (13mg) $99.00 $84.15 (15% off) $6.47
EZ Peptides 10mg + 3mg (13mg) $88.00 $79.20 (10% off) $6.09

The discount column uses code . Prices checked Oct 20, 2026, listed in the order of our Tesamorelin + Ipamorelin vendor comparison, which carries live prices. The $/mg column counts both peptides together, so a 16mg vial and a 13mg vial do not hold the same amount of tesamorelin.

A blend COA should report identity and purity for tesamorelin and for ipamorelin separately, not one combined "blend purity" figure. The tesamorelin result matters most, because cheaper GHRH analogs such as sermorelin are the documented substitution.

Vendor Evaluation Methodology

When comparing tesamorelin vendors, we evaluate three weighted factors:

Price Competitiveness (40%)

We normalize to cost per milligram for fair comparison across vial sizes. A vendor selling 10mg at $60 ($6/mg) scores higher than one selling 5mg at $45 ($9/mg), all else being equal. We weight kit pricing separately because kits require larger upfront commitment.

COA & Testing (30%)

We verify that COAs are:

  • From recognized third-party labs (Janoshik, MZ Biolabs, Colmaric)
  • Recent (within the last 6 months)
  • Verifiable on the lab's website
  • Include mass spec confirming the 5,196 Da molecular weight (critical for tesamorelin specifically)

Reputation (30%)

Community feedback from peptide forums, shipping reliability, customer service responsiveness, and business track record. We give additional weight to vendors with consistent multi-year operations and no history of batch recalls or mis-labeled product.

Shipping and Storage

What Order Arrival Typically Looks Like

Lyophilized tesamorelin typically arrives as a white or off-white powder cake in a sealed glass vial. Documented inspection points:

  • Vial integrity — no cracks, proper rubber seal, aluminum cap intact
  • Powder appearance — solid cake or loose powder, NOT liquid or discolored
  • Labeling — batch/lot number, milligram content, "for research use only"
  • Cold pack — reputable vendors ship with cold packs in summer months (tesamorelin tolerates brief room-temp shipping in lyophilized form, but extended heat exposure degrades it faster than more stable peptides)

Storage Guidelines

State Temperature Duration
Lyophilized (powder) Room temp Days only (for shipping)
Lyophilized (powder) Refrigerated (2-8°C) 12 months
Lyophilized (powder) Frozen (-20°C) 24+ months
Reconstituted (BAC water) Refrigerated (2-8°C) 14-21 days max
Reconstituted (sterile water) Refrigerated (2-8°C) 24 hours
Reconstituted Frozen Not recommended — freeze-thaw cycles degrade the hexenoyl modification

Key point: published stability data and community sources describe keeping unreconstituted vials refrigerated and reconstituting one vial at a time. See our tesamorelin reconstitution guide for documented mixing procedures.

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Frequently Asked Questions

Is tesamorelin legal to buy?
Tesamorelin is the active ingredient in an FDA-approved prescription product for HIV-associated lipodystrophy. Research-grade tesamorelin is sold by peptide vendors for laboratory use only, labeled 'not for human consumption.' Purchasing research peptides is legal in most jurisdictions, but you are not buying an FDA-regulated drug at that tier.
How much does tesamorelin cost per month?
Community-reported 1 mg/day use works out to roughly $120-300/month in research-vendor pricing on 10mg vials; the 2 mg/day regimen used in the Phase III trial would work out to roughly $240-600/month at the same prices. The approved prescription product is a different, regulated product that lists at about $3,000/month.
What vial size is most commonly stocked — 5mg or 10mg?
10mg vials are the most-cited size in community discussions. At 1 mg/day they last 10 days (well within the 14-21 day reconstituted stability window). 5mg vials rarely beat 10mg on per-mg cost and burn faster. 2mg vials are documented as the worst value — often $14/mg or higher.
What purity should I look for in tesamorelin?
Third-party HPLC testing showing 98%+ purity, plus mass spec confirming the 5,196 Da molecular weight. Tesamorelin is a 44-amino-acid GHRH analog with a trans-3-hexenoic acid modification at the N-terminus — that modification is what separates real tesamorelin from cheap sermorelin relabeled as tesamorelin.
What ratio is in a Tesa/Ipa (tesamorelin + ipamorelin) blend?
Of the four blend vendors we track (October 2026), three list a 10mg tesamorelin + 3mg ipamorelin vial and Nura Peptide lists 13mg + 3mg. Labels vary by vendor, so the per-component amounts on the product page and COA are what to compare.
What should a Tesa/Ipa blend COA show?
Separate identity and purity results for each peptide, not a single combined blend purity number. Tesamorelin is the component most often questioned, because cheaper GHRH analogs such as sermorelin can be substituted; mass spec should confirm tesamorelin specifically.
Can I get tesamorelin from a compounding pharmacy?
Tesamorelin has an FDA-approved branded version, but compounding pharmacies cannot compound FDA-approved branded drugs without a supply shortage designation. Most US telehealth clinics that offer 'tesamorelin' are actually compounding sermorelin or CJC-1295, which are different peptides. Always verify the actual compound.
Is research-grade tesamorelin the same as the FDA-approved product?
Chemically they can be the same 44-amino-acid peptide, but research-grade product is not FDA-regulated and has no guaranteed sterility, potency, or batch-to-batch consistency. The price gap (15-25x cheaper) is why the research market exists, but COA verification is non-negotiable at that tier.
What signals does the community use to evaluate vendor trust?
Recurring themes in community vendor discussions include third-party COA with a verifiable task number, the correct 5,196 Da mass on mass spec, consistent pricing in the $5-10/mg range, responsive customer service, and a clear return or reship policy. See our [Best Tesamorelin Vendors](/best/tesamorelin?from=tesamorelin-buying-guide) for documented options.

References

Citation Topic PMID
Falutz J, et al., J Clin Endocrinol Metab (2010) Pooled Phase III analysis (806 patients): visceral fat reduced 15-18% 20554713
Stanley TL, et al., AIDS (2019) Tesamorelin preserves muscle cross-sectional area 31237318
Stanley TL, et al., Lancet HIV (2019) Tesamorelin reduces liver fat and prevents fibrosis progression 31611038

This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.