Research Peptides Co.

Denver, CO · Founded 2018 · Website

Established supplier with strong purity results and improving transparency practices.

Strong Customer Experience
Tests3
Score updatedAug 10, 2026
Methodologyv2.3
Movement +2

Score Breakdown

Seven weighted dimensions, methodology v2.3. How weights work →

  • Testing & Quality 25% 93
  • Transparency 18% 84
  • Manufacturing & Sourcing 15% 88
  • Customer Experience 12% 90
  • Shipping & Fulfillment 12% 86
  • Policies & Returns 8% 88
  • Community Feedback 10% 89

Score History

Historical Index Score™ snapshots. Scores are versioned and never overwritten.

76 80 85 89 93 Sep Nov Jan Mar May Aug Sep 15, 2025: 82 Nov 15, 2025: 83 Jan 15, 2026: 85 Mar 15, 2026: 86 May 15, 2026: 87 Aug 10, 2026: 89

Editorial Assessment

Research Peptides Co. combines consistent purity performance with one of the larger catalogs we track. Independent testing has been strong across five samples, though the company only began publishing batch-level COAs in early 2026. Customer-experience signals are positive; shipping speed is average for the category.

Shipping & fulfillment
1–2 business day dispatch; tracked shipping standard on all orders.
Policies & returns
21-day documented-issue resolution policy.
Testing record
5 independent tests since 2025. Average purity 98.6%.

Independent Testing History

Testing database

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