For European research labs evaluating peptide suppliers, two names regularly appear in shortlists: Chempeptides (EU-native research catalogue) and PeptideSciences (US-based research peptide supplier with international shipping). Both operate in the research-peptide category. The differences come out in the logistics, payment, and documentation flow that matters for European researchers. This is the side-by-side.
Geography and shipping infrastructure
| Chempeptides | PeptideSciences | |
|---|---|---|
| Dispatch hub | EU (Netherlands) | United States |
| Transit to NL | 1 business day | 5–10 days |
| Transit to DE/BE/FR | 1–3 days | 7–14 days |
| Customs hold risk (EU buyer) | None (intra-EU) | 5–10% |
| Cold-chain integrity window | Well within 72-hour pack | Often exceeds pack capacity |
VAT and customs cost — the hidden surcharge
For a EU researcher ordering from a US-based supplier, the headline price is the starting point — not the final price:
- Listed price (USD)
- + International shipping ($25–60 typical)
- + VAT at destination (21% in NL, 19% in DE, etc.) applied to product + shipping
- + Customs broker fee (€15–25 typical for biochemical category)
- = Landed cost typically 35–50% above listed price
EU-native sourcing eliminates the VAT-at-import and broker fee steps — VAT is built into the listed price.
Quality verification standards
Both suppliers operate research-grade verification, but with different documentation accessibility:
| Standard | Chempeptides | PeptideSciences |
|---|---|---|
| HPLC ≥98% purity | Yes | Yes |
| Mass spectrometry | Yes, per batch | Yes, per batch |
| Karl Fischer water content | Reported per batch | Standard claim |
| CoA accessibility | On every product page | Available on request |
| Counter-ion identification | Reported | Generally TFA, reported |
The key difference for evaluation workflow: per-batch CoA accessible BEFORE purchase (Chempeptides) versus request-based (PeptideSciences). For research labs doing pre-purchase due diligence, the difference saves hours-to-days.
Payment infrastructure
Chempeptides: iDEAL, Bunq Pay, SEPA, card processing — full EU regulated rails. Native Dutch and EU consumer flow.
PeptideSciences: USD-denominated card processing, often crypto support. EU buyers face foreign currency conversion fees (typically 1.5–3% from card issuer) plus exchange rate variance.
For a €200 order: Chempeptides flow is €200 charged via iDEAL. PeptideSciences flow is ~$210 USD plus 2% FX fee plus VAT at customs = €265 effective. The payment friction adds 30%+ to the effective cost on top of the quality of life issue.
Language and customer support
EU-native suppliers operate within EU business hours (CET) with native-language customer support for major markets. PeptideSciences operates US business hours with English-only support — workable but slower for EU-side issue resolution.
Catalogue breadth
Both suppliers carry the high-frequency research compounds:
- GLP-1 class (semaglutide, tirzepatide, retatrutide)
- Tissue repair (BPC-157, TB-500)
- GHRP family (ipamorelin, hexarelin)
- GHRH analogues (sermorelin, CJC-1295)
- Specialty (MOTS-c, kisspeptin, melanotan II)
PeptideSciences has a broader specialty range due to US-market scale. Chempeptides covers the highest-demand EU research compounds with depth in metabolic and mitochondrial categories.
Cold-chain integrity at distance
The most operationally significant difference: cold-chain integrity. Lyophilised peptides tolerate moderate temperatures short-term but degrade with cumulative heat exposure during long transit. Phase-change packaging provides ~72 hours of protected temperature.
- EU-native 1–3 day transit → packaging well within window
- US-to-EU 5–14 day transit → packaging often exceeds window
For sensitive sequences (GHK-Cu, BPC-157, TB-500), the integrity difference is measurable in research outcomes.
For Dutch and EU researchers — the decision matrix
- Speed: EU-native wins (1–3 days vs 5–14)
- Effective cost: EU-native wins (no VAT-at-import surprise + no FX)
- Payment: EU-native wins (iDEAL, native EUR billing)
- Documentation accessibility: Chempeptides wins (CoA on product page)
- Catalogue breadth: PeptideSciences wider in specialty
- Customs predictability: EU-native wins (zero customs)
For the majority of standard research orders, EU-native sourcing wins on multiple dimensions. For very specific specialty compounds not stocked by EU suppliers, US sourcing may be necessary — and the customs friction is then an acceptable trade-off.
What the comparison is not
This is not a critique of PeptideSciences’ research-grade work. Both suppliers operate research-grade verification. The comparison is purely about logistics and payment flow advantage for EU researchers — which consistently favours EU-native sourcing.
Browse the Chempeptides research catalogue or audit our supplier evaluation framework.
For laboratory research use only.