Costides
Baltimore, MD storefront (domain registered August 2026) selling research peptides in 10-vial packs within the US; its certificate labs cannot be verified. Standard shipping is $15 (2–5 business days after dispatch) and free on orders of $500 or more; in-stock orders paid before 2 PM Eastern on a business day are dispatched the same day. Ten published lot certificates cover 8 of its 22 peptides (the other 14 are listed as 'Awaiting first lot'). They come from Biolumin Labs and Calvert Spectrometry, two laboratories that print no street address or accreditation and whose domains were registered on 2026-09-16 and 2026-09-21, and they fail internal consistency checks: net content outside the stated specification with no fail flag, mismatched ion labels, microbial screens not run and identical chromatogram peak values across three compounds. Their purity figures are therefore not relied on, and an open high-severity incident caps the trust axis at 3/10. No legal entity or street address is published, Trustpilot has removed the costides.us profile, no reviews exist on its own site or on PepFinder or Peptigrity, payment methods are not published and returns are not accepted.
Vendor timeline.
- Sep 28, 2026high
Certificate provenance and integrity
The ten lot certificates Costides publishes come from two laboratories that cannot be independently verified. Biolumin Labs (retatrutide 10, 20 and 30 mg tested 2026-09-14 and issued 2026-09-17; KPV and MOTS-c tested 2026-10-02 and issued 2026-10-05) prints only a website and an email address, with no street address or accreditation, and bioluminlabs.com was registered on 2026-09-16, two days after the retatrutide test date. Calvert Spectrometry (tirzepatide, tesamorelin, GHK-Cu and Wolverine analysed 2026-10-01 and reported 2026-10-03; KLOW dated 2026-10-09) prints "Fremont, CA 94538" with no street address or accreditation number, and calvertspectrometry.com was registered on 2026-09-21. The certificates fail internal checks: net content outside their own 95–105% specification with no fail flag (retatrutide 11.72 mg on 10 mg, 21.03 mg on 20 mg, 32.39 mg on 30 mg; KPV 10.92 mg on 10 mg); the retatrutide identity ion is specified as [M+3H]3+ but captioned [M+H]+; the microbial screen reads "No Test" (GHK-Cu) and "NO SCREENING (N/A)" (tirzepatide) with no exception flag; the GHK-Cu, tesamorelin and tirzepatide chromatograms share identical peak widths and heights; the four Calvert PDFs were created on 2026-10-10 and 2026-10-15, after their printed report date; the KLOW certificate has no accession, report number, signature or specification column, and Calvert's lookup matches the other four lots but not KLOW. Peptide Critic published its own analysis on 2026-09-27 ("Costides, Biolumin Labs, and the COAs That Don't Add Up"). Re-checked 2026-10-19: the three retatrutide PDFs are byte-identical to the copies downloaded in September, and the vendor publishes no legal entity or street address.
https://costides.us/us/coa — certificate library, read 2026-10-19https://costides.us/us/coa/R10-CUS908https://costides.us/us/coa/R20-CUS908https://costides.us/us/coa/R30-CUS902https://costides.us/us/coa/CUS930-KPV10https://costides.us/us/coa/CUS930-MOTSC40https://costides.us/us/coa/CUS930-T20https://costides.us/us/coa/CUS930-GHK100https://costides.us/us/coa/CUS930-TSM10-PURPLEhttps://costides.us/us/coa/CUS930-BB10https://costides.us/us/coa/CUS-1-KLOWhttps://rdap.org/domain/bioluminlabs.com — registered 2026-09-16https://rdap.org/domain/calvertspectrometry.com — registered 2026-09-21https://peptidecritic.com/lab-report/costides-biolumin-labs-and-coas-dont-add — Peptide Critic, 2026-09-27 - Jan 01, 2026
Costides founded
Operating from Baltimore, MD, USA (as printed in the site's terms and footer) — no legal entity, street address, EIN or state file number published.
What we like · what we don't.
✓Pros
- Published US shipping prices: $15 standard (2–5 business days after dispatch), $30 Express (1–3), $70 Overnight (1); standard shipping free on orders of $500 or more
- In-stock orders paid before 2 PM Eastern on a business day are dispatched the same day, per the site
- Lot-numbered certificate PDFs downloadable for 10 lots, and the store states that no order ships from a lot before its certificate is published (the certificates' problems are listed under cons)
- Published volume discounts: 5% on 3–4 packs, 10% on 5–9, 15% on 10 or more
- Research-use-only labelling on every page and an RUO attestation required at checkout
×Cons
- No legal entity, street address, EIN or state file number on any page — the terms name the seller only as 'Costides, Baltimore, MD'; the domain was registered on 2026-08-12 behind a privacy service
- Both certificate laboratories are unverifiable: Biolumin Labs and Calvert Spectrometry print no street address or accreditation, and their domains were registered days before their certificates — bioluminlabs.com on 2026-09-16, a day before the retatrutide certificates were issued and two days after their printed test date; calvertspectrometry.com on 2026-09-21, ten days before its first printed analysis date
- Certificate defects: net content outside the certificate's own 95–105% specification with no fail flag (retatrutide 10 mg 11.72 mg, 20 mg 21.03 mg, 30 mg 32.39 mg; KPV 10.92 mg); the retatrutide identity ion is specified as [M+3H]3+ but captioned [M+H]+; microbial screens read 'No Test' (GHK-Cu) and 'NO SCREENING (N/A)' (tirzepatide) with no exception flag; the GHK-Cu, tesamorelin and tirzepatide chromatograms share identical peak widths and heights; PDFs were created after the printed 'Reported 03 Oct 2026'; the KLOW certificate has no report number or signature and Calvert's lookup does not find it
- The certificates' purity figures are not relied on: no headline purity is stated for Costides, and the listing rows repeat each certificate's figure next to its defects
- 14 of the 22 peptides on sale are listed as 'Awaiting first lot', with no certificate
- Trustpilot has removed the costides.us profile ('goes against our guidelines', checked 2026-10-19) while the site footer and llms.txt still link to it; Trustpilot gives no specific reason and has removed other peptide vendors' profiles too
- No reviews anywhere: the site's own reviews page reads 'No reviews published yet', and PepFinder and Peptigrity list none
- Sold only in 10-vial packs at a single strength ($145–$475 a pack before volume discounts)
- No returns: only items that arrive damaged or are lost in transit are replaced or refunded, once the claim is confirmed
- Payment methods are not published; they are shown only at checkout
- Affiliate terms are not public: the partner page publishes no rate, cookie or payout; the 10% rate comes from the vendor's email of 2026-09-28, and the referral link sets a 30-day pk_ref cookie (observed 2026-10-19)
- Per-vial prices sit far below the other US-domestic vendors in this register: retatrutide 10 mg works out at $20 a vial against $79–165 elsewhere
Compounds carried.
3 tracked compounds with a page-verified listing from Costides.