Best sources ranked · 2026

Best IGF-1 LR3 Sources

52 US vendors carry IGF-1 LR3. Ordered below by the lab-rule score of each vendor’s certificate for IGF-1 LR3, then by the vendor’s published score; prices are per milligram. Long-acting 83-amino-acid analog of insulin-like growth factor 1 with an N-terminal extension and an arginine substitution. Sold for laboratory research use only.

Vendors
52

Vendors

With COAs
38

With COAs

Best $/mg
$28.20

Best $/mg

New to IGF-1 LR3? What is IGF-1 LR3? Our plain-English, research-use-only guide: what it is and how to spot a verified source.

Every IGF-1 LR3 source, by certificate

Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. How the lab rule scores a certificate. For the market-wide picture, see our 2026 study of peptide vendor testing.

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

9.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.84certificate

Vendor score 8.09/10Strong

Price per mg
$60.00
Best price
$60.00 / 1mg
9.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.72certificate

Vendor score 7.15/10Strong

Price per mg
$84.95
Best price
$84.95 / 1mg
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.03certificate

Vendor score 8.08/10Strong

Price per mg
$69.99
Best price
$69.99 / 1mg
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.445certificate

Vendor score 7.88/10Strong

Price per mg
$64.00
Best price
$64.00 / 1mg
9.0/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.8certificate

Vendor score 7.79/10Strong

Price per mg
$79.99
Best price
$79.99 / 1mg
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.56certificate

Vendor score 7.67/10Strong

Price per mg
$85.00
Best price
$85.00 / 1mg
9.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.793certificate

Vendor score 7.67/10Strong

Price per mg
$65.00
Best price
$65.00 / 1mg
9.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.092certificate

Vendor score 7.12/10Strong

Price per mg
$85.00
Best price
$85.00 / 1mg
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.72certificate

Vendor score 7.90/10Strong

Price per mg
$65.00
Best price
$65.00 / 1mg
Shop Luv Aminos → (opens in new tab)
8.5/103 base, +2 Ethos Analytics Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, no purity figurecertificate

Vendor score 7.88/10Strong

Price per mg
$49.50
Best price
$99.00 / 2mg
Show 42 more carriers
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.61certificate

Vendor score 7.48/10Strong

Price per mg
—
Best price
—
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.59certificate

Vendor score 7.43/10Strong

Price per mg
$109.00
Best price
$109.00 / 1mg
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.78certificate

Vendor score 7.33/10Strong

Price per mg
$80.00
Best price
$80.00 / 1mg
8.5/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.923certificate

Vendor score 7.29/10Strong

Price per mg
$59.99
Best price
$59.99 / 1mg
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.9certificate

Vendor score 7.14/10Strong

Price per mg
$89.99
Best price
$89.99 / 1mg
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.94certificate

Vendor score 6.86/10Fair

Price per mg
$84.99
Best price
$84.99 / 1mg
8.5/103 base, +2 Chromate tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.993certificate

Vendor score 6.43/10Fair

Price per mg
$79.99
Best price
$79.99 / 1mg
8.5/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.77certificate

Vendor score 5.79/10Fair

Price per mg
$145.00
Best price
$145.00 / 1mg
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.8certificate

Vendor score 5.62/10Fair

Price per mg
$118.15
Best price
$118.15 / 1mg
8.0/103 base, +2 BioRegen tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.22certificate

Vendor score 7.78/10Strong

Price per mg
$70.00
Best price
$70.00 / 1mg
8.0/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, 0 purity 99.6certificate

Vendor score 7.30/10Strong

Price per mg
$67.00
Best price
$67.00 / 1mg
8.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.08certificate

Vendor score 7.10/10Strong

Price per mg
$54.99
Best price
$54.99 / 1mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.51certificate

Vendor score 7.09/10Strong

Price per mg
$74.99
Best price
$74.99 / 1mg
Shop Arctic Lab Supply → (opens in new tab)
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.122certificate

Vendor score 6.76/10Fair

Price per mg
$79.99
Best price
$79.99 / 1mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.362certificate

Vendor score 6.65/10Fair

Price per mg
$51.00
Best price
$51.00 / 1mg
8.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.5certificate

Vendor score 6.54/10Fair

Price per mg
$150.00
Best price
$150.00 / 1mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.19certificate

Vendor score 6.03/10Fair

Price per mg
$69.99
Best price
$69.99 / 1mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.43certificate

Vendor score 5.40/10Weak

Price per mg
$84.95
Best price
$84.95 / 1mg
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.45certificate

Vendor score 5.39/10Weak

Price per mg
$59.96
Best price
$59.96 / 1mg
Shop Swiss Chems → (opens in new tab)
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.61certificate

Vendor score 5.01/10Weak

Price per mg
$104.99
Best price
$104.99 / 1mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.452certificate

Vendor score 4.68/10Weak

Price per mg
$104.99
Best price
$104.99 / 1mg
6.5/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, -1.5 purity 98.63certificate

Vendor score 6.88/10Fair

Price per mg
$134.99
Best price
$134.99 / 1mg
6.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 98.54certificate

Vendor score 6.14/10Fair

Price per mg
$59.99
Best price
$59.99 / 1mg
5.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, -3 purity 95.65certificate

Vendor score 7.70/10Strong

Price per mg
—
Best price
—
5.5/103 base, +2 MZ Biolabs tier A, +0.5 purity 99.7certificate

Vendor score 3.56/10Poor

Price per mg
$89.99
Best price
$89.99 / 1mg
5.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, -3 purity 95.718certificate

Vendor score 6.14/10Fair

Price per mg
$50.00
Best price
$50.00 / 1mg
5.0/103 base, +2 MZ Biolabs tier A, 0 purity 99.07certificate

Vendor score 5.59/10Fair

Price per mg
$230.00
Best price
$230.00 / 1mg
4.5/103 base, +0 Analytical Formulations tier C, +1.5 key, 0 purity 99.4certificate

Vendor score 4.54/10Weak

Price per mg
$180.00
Best price
$180.00 / 1mg
2.0/10SteriGenix Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 4.80/10Weak

Price per mg
$74.00
Best price
$74.00 / 1mg
2.0/10North American Diagnostics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.95/10Poor

Price per mg
$89.99
Best price
$89.99 / 1mg
2.0/10Verum Analytics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.70/10Poor

Price per mg
$110.00
Best price
$110.00 / 1mg
Shop BioInfinity → (opens in new tab)
0.0/10no certificatecertificate

Vendor score 6.67/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$69.99
Best price
$69.99 / 1mg
0.0/10no certificatecertificate

Vendor score 6.08/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$79.00
Best price
$79.00 / 1mg
Shop Hello Stacks → (opens in new tab)
0.0/10no certificatecertificate

Vendor score 5.95/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
Out of stock
Best price
—
Shop NextGen Peps → (opens in new tab)
0.0/10no certificatecertificate

Vendor score 4.52/10Weak

NoneNo third-party COA was publicly available at audit time
Price per mg
$89.00
Best price
$89.00 / 1mg
0.0/10no certificatecertificate

Vendor score 4.39/10Weak

NoneNo third-party COA was publicly available at audit time
Price per mg
$85.00
Best price
$85.00 / 1mg
0.0/10no certificatecertificate

Vendor score 3.72/10Poor

Login-gatedCOAs are provided but sit behind the vendor's login wall
Price per mg
$152.99
Best price
$152.99 / 1mg
0.0/10no certificatecertificate

Vendor score 3.63/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$65.99
Best price
$65.99 / 1mg
0.0/10no certificatecertificate

Vendor score 3.26/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$125.00
Best price
$125.00 / 1mg
0.0/10no certificatecertificate

Vendor score 2.75/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$100.85
Best price
$100.85 / 1mg
0.0/10no certificatecertificate

Vendor score 2.13/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$28.20
Best price
$282.00 / 10 x 1mg pack
0.0/10no certificatecertificate

Vendor score 1.63/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$179.99
Best price
$179.99 / 1mg

“Shop” links may be affiliate links (rel="sponsored"); we may earn a commission. Affiliate status never affects any rating, rank, or gate. Disclosure.

Affiliate partners carrying IGF-1 LR3

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

Highest-placed partner

Amino Club9.0/10 certificate

The highest-placed affiliate partner in the table above for IGF-1 LR3: certificate 9.0/10, vendor score 8.08/10.

Largest partner reader code

The largest reader discount among our affiliate partners carrying IGF-1 LR3: 25% off with code PSRINFO.

Shop Arctic Lab Supply → (opens in new tab)
Arctic Lab Supply discount code →

IGF-1 LR3: Frequently Asked Questions

Who has the best IGF-1 LR3?

In our 2026 audit, Southern Aminos is listed first for IGF-1 LR3: its certificate for IGF-1 LR3 scores 9.5/10 on our lab rule, and its published vendor score is 8.09/10. The full ordered table is on this page.

What is the cheapest IGF-1 LR3 per mg?

The lowest recorded price per milligram for IGF-1 LR3 in our audit is the "Best $/mg" figure at the top of this page, and every carrier's price per mg is in the table. Cheapest is not the same as best: the table is ordered by certificate and vendor score, not by price.

How do you rate IGF-1 LR3 vendors?

Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. The certificate score is the same lab rule that builds each vendor's lab sub-score, applied to that vendor's certificate for IGF-1 LR3; the vendor score is the published overall score. Price per mg is shown but does not change the order. See our methodology for the lab rule.

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