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The Roundup

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vendor matchup · audited

Particle Peptides vs Summit Biotech

Two audits, side by side. Composite, subscores, shipping, payment, coupons. Particle Peptides takes the higher composite this cycle.

§ 01

Composite score

particle-peptides

Particle Peptides

84/100

EU-based vendor with the deepest catalog-COA surface in our cohort and a clear methodology improvement curve from 2024 to 2025+. 2024-vintage Apigenex-tested batches show a content-vs-label gap (70–80% measured content on label-stated quantities); 2025+ Liquilabs assays meet label. Carries Retatrutide under the alias "GLP-3" — buyers searching for retatrutide may not realise.

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vs
summit-biotech

Summit Biotech

55/100

Operator received an FDA warning letter on December 10, 2024 as "Summit Research Peptides," then rebranded to Summit Biotech without disclosing the prior identity on the new site. Login-walled catalog, code-name SKUs for the FDA-cited compounds, and the cheapest per-mg pricing in our seven-vendor index on Tirzepatide, Retatrutide, and Semaglutide. ~90% of COAs are real Janoshik public-database links.

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§ 02

Subscore breakdown

metricParticle PeptidesSummit Biotech
composite
weighted avg
●84/10055/100○
purity / coa
●85/10070/100○
shipping
domestic days
●4.0d5.0d○
pricing
○90/10095/100●
support
●80/10040/100○
last tested
·2026-05-092026-05-09·
payment
·cryptocrypto, card·
§ 03

Catalog overlap

only particle-peptides
aod-9604
both
bpc-157tb-500ghk-curetatrutidemots-c
only summit-biotech
tirzepatidesemaglutidetesamorelincagrilintide
§ 04

Active coupons

active code · Particle Peptides
10% off, stackable with bulk(10% off)
visit vendor →
PARTICLE10
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