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Save on your next order with verified discount codes from top-rated peptide vendors.

How We Score →

Only 32 of 69 evaluated peptide suppliers currently meet PeptideScores verification standards. 339 COAs reviewed.

Rankings are determined solely by our independent scoring methodology and not paid placement.

PeptideScores may earn affiliate commissions when you buy through links on this page. Commissions never influence scores, rankings, or placement — our scoring methodology is applied identically to every vendor.

Flawless Compounds - Labor Day Sale! Save 35% on purchases up to $290. 45% on purchases $300-399 and 50% on purchases $400 and over.
Flawless Compounds

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Full Profile99.5
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Glow Aminos - Labor Day Sale! Save 35% on purchases up to $290. 45% on purchases $300-399 and 50% on purchases $400 and over.
Glow Aminos

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Full Profile99.5
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Southern Aminos

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Full Profile99.4
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New brand from the founders of Flawless and Glow! Same top tier testing. Iron Protocol - Labor Day Launch Day Sale!! Save 45% sitewide + coupon PEPSCORES stacks for additional 15% off.
Iron Protocol

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Full Profile99.2
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Labor Day Sale! 20% off sitewide up to 40% with coupon PEPSCORES + ACH.
Ion Peptides

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Full Profile98.8
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Ascension Peptides

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Full Profile98.5
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Coupon code PEPSCORES is temporarily increased to 30% off sitewide, plus an additional 10% if you pay with crypto.
EZ Peptides

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Full Profile98.3
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Buy 3, Get 1 Free on GLP Category Compounds
Step One Ventures

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Full Profile98.1
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GenPeptide

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Full Profile98.0
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Rivn Peptides

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Full Profile98.0
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LA Peptides

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Full Profile97.9
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IDUN Peptides

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Full Profile97.8
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FITSKNS

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Full Profile97.8
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Midwest Peptide

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Full Profile97.0
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Labor Day Sale: 20% Off Sitewide
Limitless Life

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Full Profile96.5
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Nura Peptides

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Full Profile96.5
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Amino Club

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Full Profile96.5
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Crownwell Research

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Full Profile96.2
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Wondering how we evaluate vendors? Read our Scoring Methodology or browse the Full Rankings.

Research & Informational Use Only. PeptideScores does not sell, endorse, or facilitate the purchase of any compound for human use. All compounds referenced are intended for laboratory research purposes only. We review vendors; we do not provide dosing guidance, medical advice, or treatment recommendations.