Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.

Best L-Carnitine Vendors of 2026

Ranked by Price, Purity, and Reputation

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Quick Comparison

1Ion PeptideCOA
10/10
5000mg$0.01/mg

Bulk Pricing

Per-vendor quantity breaks — pick a vial size to see the bulk price. Must purchase the full pack.

Ion PeptideCOA15% code thepeptidecatalog
as low as $0.0051/mg
$300.005000mg × 10$0.0060/mg → $0.0051/mg with code
View at Ion Peptide
EZ PeptidesCOA10% code thepeptidecatalog
as low as $0.0078/mg
$432.005000mg × 10$0.0086/mg → $0.0078/mg with code
View at EZ Peptides

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How We Score Vendors

Our scoring is based on three weighted factors:

Price Competitiveness (40%)

Normalized to cost per milligram for fair comparisons across vial sizes.

COA Availability (30%)

Third-party lab testing confirming purity, identity, and absence of contaminants.

Vendor Reputation (30%)

Community feedback, shipping reliability, customer service, and business track record.

Best Semaglutide Vendors of 2026 →

Ranked by price, purity testing, and buyer trust

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