$7
Testing unverified Compound: 1 COALive data
Availability
In stock
Last checked
3 hours ago
All compounds0%
Growth factor peptide
Live dataIGF-1 LR3
Muscle & performance
A recombinant analog of insulin-like growth factor 1 carrying an arginine substitution and a 13-amino-acid N-terminal extension.
Long R3 IGF-1IGF-1 Long R3LR3 IGF-1
Observed median price
$85
13
Active listings
1 · 98.1%
Independent lab tests
$7–$673
Observed price range
4
Known aliases
Read from the certificate, not re-measured by VialGrade.
Understand this compound
What is IGF-1 LR3?
Limited human dataa.k.a. Long R3 IGF-1A long-acting IGF-1 analog studied in muscle-growth research.
Muscle & performance
⚠
Good to know: Non-selective IGF-1 receptor activation raises theoretical concerns about abnormal tissue growth, and its extended half-life increases the risk of hypoglycemia associated with IGF-1 pharmacology.
How does IGF-1 LR3 work?
A modified 83-amino-acid IGF-1 analog with an Arg3 substitution and a 13-amino-acid N-terminal extension that reduces binding to IGF binding proteins, extending half-life (~20-30 hours) and activating IGF-1 receptor PI3K/Akt and MAPK/ERK pathways.
Mechanism of action from published research — how the molecule behaves, not a claim about any product or any human-use effect.
What is IGF-1 LR3 researched for?
Studied for muscle hypertrophy/hyperplasia and cell proliferation via satellite cell activation, in muscle-growth and metabolic research.
- Muscle & performanceStudied in muscle-growth, repair, and physical-performance research.
How far has the research gone?
Limited human data; evidence is mostly mechanistic, lab, and animal research, without clinical validation in humans for muscle-building use.
Where the science stands — an approved drug is not the same as the research-grade material a vendor sells, which is unregulated regardless.
What should I check before buying?
- Independent purity. Look for a third-party COA (Janoshik or MZ) showing a measured purity — not just a number the vendor typed.
- Batch match. The strongest evidence is a certificate for the exact batch you’ll receive, attributed to this vendor — check the cross-verification on the listing.
- Vendor reputation. See how the vendor is talked about in the community before trusting a new name.
Research context only — VialGrade never gives dosing, medical, or human-use guidance.
US legal statusBanned in drug-tested sport (WADA/USADA)
Research-use-only — not FDA-approved
Sold “for research use only,” this compound is not FDA-approved for human use and has not been evaluated for safety, purity, or sterility in people. It is generally not a scheduled controlled substance, so buying it as a research chemical is typically not itself a drug crime — but marketing or using it as a drug is not lawful, and it is not a dietary supplement.
Read the full US legal overview →General information, not legal or medical advice. VialGrade sells nothing and encourages no human use.
Compare by real cost
Cheapest IGF-1 LR3, by price per mg
Vials come in different sizes, so the sticker price lies. This ranks every listing by what a milligram actually costs — with independent test purity where we have it.
| # | Vendor | Size | Price | Per mg | Tested purity | Real $/active mg | |
|---|---|---|---|---|---|---|---|
| 1 | Umbrella Labs | 10mg total10 Milligrams each | $301 | $30.1/mg · too cheap? | — | $30.7/mgbest value | View |
| 2 | Swiss Chems | 1mg total | $60 | $60.0/mg | — | $61.1/mg | View |
| 3 | Modern Aminos | 1mg total | $64 | $64.0/mg | — | $65.2/mg | View |
| 4 | Bluum Peptides | 1mg total | $75 | $75.0/mg | — | $76.4/mg | View |
| 5 | Peptide Pros | 1mg total | $90 | $90.0/mg | — | $91.7/mg | View |
| 6 | Umbrella Labs | 1mg total | $90 | $90.0/mg | — | $91.7/mg | View |
| 7 | Sports Technology Labs | 1mg total | $125 | $125.0/mg | — | $127.4/mg | View |
| 8 | Chameleon Peptides | 1mg total | $673 | $673.2/mg | 98.1% | $686.0/mg | View |
Real $/active mg divides the price-per-mg by the measured purity — the honest cost of the actual peptide, so a 90%-pure vial isn’t compared as if it were 99%. Too cheap? flags a listing far below the market rate — often underdosing or a fake, not a deal. The crown marks the cheapest non-outlier; best value marks the lowest real cost per active mg.
Current market
All IGF-1 LR3 listings
$13
Vendor catalog Compound: 1 COALive data
Availability
In stock
Last checked
8 days ago
$35
Vendor catalog Vendor flaggedLive data
Availability
In stock
Last checked
1 hour ago
$60
$60.0/mg
-27% vs median/mg
Vendor catalog Compound: 1 COALive data
Availability
In stock
Last checked
3 hours ago
$64
$64.0/mg
-22% vs median/mg
Testing unverified Compound: 1 COALive data
Availability
In stock
Last checked
2 hours ago
$75
$75.0/mg
-9% vs median/mg
Testing unverified Compound: 1 COALive data
Availability
In stock
Last checked
3 hours ago
$85
Vendor catalog Compound: 1 COALive data
Availability
In stock
Last checked
1 hour ago
$90
$90.0/mg
+9% vs median/mg
Vendor catalog Compound: 1 COALive data
Availability
In stock
Last checked
1 hour ago
$90
$90.0/mg
+9% vs median/mg
Vendor catalog Compound: 1 COALive data
Availability
In stock
Last checked
2 hours ago
$105
Testing unverified Vendor flaggedLive data
Availability
In stock
Last checked
1 hour ago
$125
$125.0/mg
+52% vs median/mg
Testing unverified Compound: 1 COALive data
Availability
In stock
Last checked
3 hours ago
$301
$30.1/mg
-64% vs median/mg
Vendor catalog Compound: 1 COA Too cheap?Live data
Availability
In stock
Last checked
2 hours ago
$673
$673.2/mg
+716% vs median/mg
Independent test Independently testedLive data
Availability
In stock
Last checked
1 hour ago
Independent testing
IGF-1 LR3 — independent lab tests
Real, publicly verifiable third-party tests. Purity is read from the certificate itself. A test reflects one lab’s result for one submitted batch — not a guarantee that every vial matches.
How does this data get here?
Every record below is a real certificate of analysis, gathered two ways: from the public verification feeds that independent labs (like Janoshik) publish, and from the certificates vendors post on their own product pages. We open each certificate document and read the measured purity, content, batch, and date directly off it — a scraper can’t read a number printed inside an image, so this is done by machine vision, then recorded here with a link back to the original.
Nothing here is typed in by a vendor or invented by us. Where a certificate is missing, we say so rather than filling the gap.
We re-check the lab feed, too. A “still listed” tag means the certificate is currently public in Janoshik’s database — we re-verify against the live feed and stamp the date. If a cert is later pulled, the tag flips. It’s a freshness check on the same source, not a second independent opinion.
What a certificate does & doesn’t prove
Three different questions. Purity (“how clean?”), identity (“is it the right molecule?”, a mass-spec test), and content (“did I get the labeled mg?”) are separate. A vial can be 99% pure and still be the wrong peptide, or the right peptide underdosed. We flag the measured dose against the label above; underdosing is the most common real fraud.
Who submitted the sample matters. Most of these are vendor-submitted — the seller chose which vial to send, so one good certificate doesn’t prove every batch is the same. The gold standard is a blind test, where a buyer sends a vial they bought as a normal customer. Same label doesn’t prove same product; same batch number doesn’t prove same batch.
98.1%
highest tested purity
| Certificate | Manufacturer | Batch | Purity | Content / dose | Lab | |
|---|---|---|---|---|---|---|
 | Chameleon Peptides | — | 98.13% | 1.08 mg | Janoshik Analytical | View |
Research notes aren’t product proof
Research summaries describe published literature and market data only. They do not establish the identity, quality, safety, or legal status of any listed physical product.