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31 compounds in stock, 114 of their 114 listings backed by a published COA, and 10% off with code PEPLOOKUP. See how their live prices compare with every other supplier on their profile.
31
Compounds in stock
114
Listings tracked
114
Listings with COAs
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10% off
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90 listed
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ZC LabsPepLookup Community · Hosted on Skool
A free forum for researchers to learn peptide science, interpret certificates of analysis, review published studies and compare verified suppliers.
Sparta Labs is a U.S. research peptide supplier offering ≥99% purity, third-party HPLC testing, batch-specific COAs and cold-chain fulfillment.
Exclusive Sparta Labs offer
15% off with coupon
Before you order
Product catalog
$2.55/mg · seen 1mo ago
View COA
$3.12/mg · seen 1mo ago
View COA
$0.045/mg · seen 1mo ago
View COA
$10.20/mg · seen 1mo ago
View COA
$4.68/mg · seen 1mo ago
View COA
$3.83/mg · seen 1mo ago
View COA
$11.90/mg · seen 1mo ago
View COA
$3.83/mg · seen 1mo ago
View COA
$5.31/mg · seen 1mo ago
View COATested by Independent laboratory
Overview
Sparta Labs holds full certificate-of-analysis coverage: all 55 tracked listings link to an independent laboratory document, matched with a public review average of 4.3 out of 5 one of the stronger verification-plus-reputation combinations PepLookup tracks. Sparta Labs is a US-based supplier established in 2026, currently listing 26 compounds, with all 55 associated listings in stock at last check. This Sparta Labs review is built from prices read directly from the supplier's own product pages and converted to cost per milligram, so a single vial and a multi-vial kit can be compared on the same scale as every other tracked supplier. Payment runs through standard processors Visa, Mastercard, Apple Pay. PepLookup does not sell Sparta Labs's products: every order is placed directly on the supplier's own site, for laboratory research use only.
Highlights
Sparta Labs pairs complete documentation with a solid reputation: all 55 listings link to an independent lab COA, and its public review profile averages 4.3 out of 5. The catalogue covers 26 compounds, each priced per milligram for fair comparison, all currently in stock. Payment options include Visa, Mastercard and Apple Pay standard processing, no unusual restrictions. Prices carry the time they were last seen, and out-of-stock listings never win a comparison. None of this is an endorsement: compare cost per mg, read the COA for your specific batch, and confirm current terms on Sparta Labs's own site before ordering.
Comparison
Of the 26 compounds Sparta Labs carries that overlap with other tracked suppliers, it did not hold the lowest cost per mg on any of them. PepLookup tracks 89 other suppliers, ranking every listing by cost per milligram rather than headline price, since pack sizes differ. Sparta Labs's strength here is verification and consistency, not price full COA coverage and a strong rating rather than the cheapest listing. Check the comparison table for exact positioning.
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