Zentra Peptides review
Checked 30 September 2026 ·No commercial relationship. Links to vendors are marked as sponsored.
Score 100/100 · position 9 of 36
Excellent
Trading name of Zentra Brands Limited, selling retatrutide as 'RT3' in 10mg to 40mg vials, with Sonic Laboratories certificates published on a batch verification page.
What we found in its favour
- Company name, number (17212134) and address shown on the site and matching Companies House.
- Certificates for the 10mg, 20mg and 40mg batches dated 1 September 2026 are published, each with a lab lookup code.
- Written returns policy covering damaged, incorrect and defective items.
- Free UK delivery on orders over £100; same-day dispatch before 2pm on weekdays.
What cost it points
- Certificates are from Sonic Laboratories rather than Janoshik; no certificate is listed for the 30mg size.
- 10mg and 30mg sizes shown as out of stock on 30 September 2026.
- Delivery times differ between the shipping policy and the FAQ.
- Company incorporated on 11 May 2026, so trading history is short.
- Trustpilot profile has 18 reviews (checked 30 September 2026).
Retatrutide prices
| Product | Price | Per mg | Stock |
|---|---|---|---|
| RT3 10mg | £42.99 | £4.30/mg | Out of stock |
| RT3 20mg | £79.99 | £4.00/mg | In stock |
| RT3 30mg | £115.95 | £3.87/mg | Out of stock |
| RT3 40mg | £145.95 | £3.65/mg | In stock |
Prices as shown on the Zentra Peptides site on 30 September 2026. Terms state prices are in GBP and include VAT where applicable. No VAT number was found on the pages checked.
Shipping details confirmed — 15/15
- UK delivery terms published: delivery 2–3 business days (standard); next business day (express); cost £4.18 standard; £5.39 express; free over £100
Dispatch: Same business day for orders before 2pm Monday–Friday. Delivery: 2–3 business days (standard); next business day (express). Cost: £4.18 standard; £5.39 express. Free delivery over £100. Figures from the shipping policy updated 19 September 2026. The FAQ states standard delivery takes 1–2 working days and the contact page gives a 3pm dispatch cut-off. Carrier not named. International shipping from £16.99.
Payment methods listed — 10/10
- Payment methods listed: pay by bank, bank transfer
Payment options: pay by bank (open banking), bank transfer. Checkout lists Fena (pay by bank) and direct bank transfer. The FAQ says cards, Apple Pay and Google Pay are accepted; card payment was not confirmed at checkout.. No change-of-mind returns. Returns accepted for damaged (report within 48 hours), incorrect or verifiably defective items, after contacting info@zentra-peptides.com. Refunds aimed within 5–10 business days.
Independent lab report published — 20/20
- 3 retatrutide lab reports published
| Lab | Test | Task / ID | Strength | Batch | Result | Tested |
|---|---|---|---|---|---|---|
| Sonic Laboratories | Identity & purity | #SD20260829_005_RT40 | 40 mgmeasured 43.27 mg | ZC0042 | 99.87% | 1 September 2026 |
| Sonic Laboratories | Identity & purity | #SD20260829_006_RT20 | 20 mgmeasured 21.67 mg | ZC0041 | 99.494% | 1 September 2026 |
| Sonic Laboratories | Identity & purity | #SD20260829_007_RT10 | 10 mgmeasured 10.43 mg | ZC0040 | 99.07% | 1 September 2026 |
Lab details are as published by the vendor. We have not yet confirmed these reports on the lab’s own verification page.
Lab report from the last 12 months — 10/10
- Latest report dated 2026-09-01 (29 days before our check)
Contact info listed — 10/10
- Contact details listed: email, phone, address, WhatsApp
Zentra Brands Limited, company number 17212134 (England and Wales), status active, incorporated 11 May 2026. Registered office: Legion House, 75 Lower Road, Kenley, England, CR8 5NH. Companies House record. SIC 47990 – Other retail sale not in stores, stalls or markets.
Independent rating found — 15/15
- Trustpilot 4.6 from 18 reviews
- Trustpilot: 4.6 from 18 reviews (checked 30 September 2026) — view
Perks confirmed — 10/10
- Free delivery on orders over £100
Prices and stock listed — 10/10
- Price and stock shown for all 4 listed products
Sources
Everything above comes from these pages, checked on 30 September 2026:
- zentra-peptides.com/
- zentra-peptides.com/product/rt3/
- zentra-peptides.com/wp-json/wc/store/v1/products?type=variation&parent=1046
- zentra-peptides.com/batch-verification/
- zentra-peptides.com/wp-content/uploads/2026/09/RT3-10mg-ZC0040-COA.pdf
- zentra-peptides.com/wp-content/uploads/2026/09/RT3-20mg-ZC0041-COA.pdf
- zentra-peptides.com/wp-content/uploads/2026/09/RT3-40mg-ZC0042-COA.pdf
- zentra-peptides.com/policy_shipping/
- zentra-peptides.com/policy_refund-policy/
- zentra-peptides.com/policy_terms-of-service/
- zentra-peptides.com/policy_legal-notice/
- zentra-peptides.com/contact-us/
- zentra-peptides.com/faq/
- zentra-peptides.com/wp-json/wc/store/v1/cart
- uk.trustpilot.com/review/zentra-peptides.com
- find-and-update.company-information.service.gov.uk/company/17212134
Spotted something out of date?
Vendors change prices and policies often. Email contact@retaradar.co.uk and we will re-check.