VERDICT
Arctic Lab Supply wins this matchup overall with 8.2/10 against 8.1/10 for ThePeptideCode LTD. A very narrow margin. ThePeptideCode LTD scores higher on transparency, support and customer reviews. Arctic Lab Supply comes out ahead on purity & testing, price & value and shipping. ThePeptideCode LTD has the lower free-shipping threshold (£100 vs $149). Arctic Lab Supply has a CodeVial code (10% OFF); ThePeptideCode LTD has none. In short — ThePeptideCode LTD: UK buyers who want published COAs and Royal Mail Tracked delivery in 1-3 working days. Arctic Lab Supply: Buyers in the US or Canada who want lot-matched lab reports and same-day dispatch from Alaska.
| Criterion | ThePeptideCode LTD | Arctic Lab Supply |
|---|---|---|
| Overall score | 8.1 | 8.2WIN |
| Purity & testing | 7.5 | 9.0WIN |
| Transparency | 10.0WIN | 9.5 |
| Price & value | 5.0 | 5.4WIN |
| Shipping | 8.5 | 9.5WIN |
| Support | 8.5WIN | 7.0 |
| Customer reviews | 8.7WIN | 7.3 |
| Ratings on other platforms | 4.6/5 from 105 reviews · Trustpilot | 4.2/5 from 28 reviews · Trustpilot |
| Best coupon | Not published | 10% OFF |
| Price range | £5.40 | $27.99 |
| Free shipping from | £100 | $149 |
| Delivery | Royal Mail Tracked, 1-3 working days; same-day dispatch before a cut-off (2 PM or 12 noon, pages differ) | Same-day dispatch if paid by midnight ET; US Priority about 2–4 days, international usually 7–21 business days |
| Ships to | United Kingdom | United States, Worldwide, Europe, Canada |
| Range | Research peptides, Laboratory-grade peptides, Batch-tested peptides | Research peptides, Lab supplies, Vial-cap gear, Pre-order items |
| Purity claim | ≥99% | Not published |
| Lab testing | The shop states every batch is tested by ISO/IEC 17025 accredited labs (HPLC purity, mass-spec identity); COA library lists 3 COAs. | 20 current lot-matched reports from ILS Laboratories and Freedom Diagnostics, viewable without an account. |
| Public COAs | Yes | Yes |
| Payment methods | Credit card, Debit, Fena), Bank transfer | Credit card, Bank transfer, Apple Pay, Google Pay, Zelle |
| Contact | E-mail, Phone, Contact form | E-mail, Contact form |
| Refunds | All sales final, except a full refund or free replacement for damaged, lost, wrong or quality-issue orders claimed within 14 days of delivery. | Full refund if cancelled before shipping; 30 days on unopened items (you pay return); damaged or lost: reship or refund if reported in 48 hours. |
Best codes
It takes 10% off your product subtotal on every order, for new and returning customers. One code per order: SAVE10 doesn’t combine with other codes or with first-order or welcome-back offers.
Source: arcticlabsupply.com/discount-code · checked Nov 3, 2026
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