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VendorsNextday Peptides
Layer A — cited: COA practices, testing, enforcement, provenanceLayer B — disclaimed: online sentiment, community reportsIndependence firewall: the Trust Index is computed from cited facts only — never sold, never sorts the directory.
V0 · V1 · V2 · V3 · V4

Overview

Independence-firewalled vendor profile · Trust Index computed from cited facts

Nextday Peptides

nextdaypeptides.comUnder reviewResearch use only

US-facing research-peptide supplier, research-grade. Publishes certificates of analysis. Third-party tested. Identity and claims are vendor-stated unless cited. Research use only.

3rd-party testedPublishes COAsDomestic shippingReship policy
—products listed
0.0/5Trustpilot (.io)
—founded
Candidateconfidence
2026-07-08 as of
Vendor Trust Index
/100
Provisional — Insufficient Data

Not enough cited data to compute a Trust Index. Absence of evidence is not evidence of badness.

Coverage84%
ConfidenceModerate
Cited facts27

A transparency readout of 27 cited facts — never sold, never sorts the directory; not a safety verdict (RUO). How it’s computed →

Catalog breadth

—
No data available

External rating

Cited
0.0/5
peptides.so (supplier directory) · 0 reviews

COA policy

Cited
Yes
publishes COAs

Operating status

Cited
Under review
as of 2026-07-08

Trust Index breakdown

DerivedV3

The Trust Index weighs five evidence pillars — purity claims-vs-reality, testing transparency, enforcement conduct, operational accountability and reputation integrity — into a single 0–100 factor. Nothing here can be bought.

Provisional — Insufficient Data. This listing is under review; the Trust Index is withheld until verification completes. A precise number is withheld rather than guessed — absence of evidence is never shown as a low score.

Evidence at a glance

DerivedV3
Products listed
1
Publishes COAs
Yes
Independent tests tracked
1
Enforcement records
0
Cited sources
27

Methodology & independence

CitedV4
  • The Trust Index is computed only from cited facts — and can never be bought.
  • Sponsorship & affiliate are excluded by construction — they never move the score, sort, or inclusion.
  • Facts are dated and cited; absent data lowers confidence, never the score (absence isn’t evidence of bad).

No affiliate relationship with this vendor.

Legitimacy signals

DerivedV2
Official domain
nextdaypeptides.com
Payment
Zelle · Venmo · Cash App · Link Money · Bitcoin · Check / Money Order
Third-party testing
Yes
Published COAs
Yes
HQ disclosed
US-FL
Sponsored placement
No

Vendor details

CitedV1
Founded (claimed)
No data available
Domain registered
2025-11-12
HQ
US-FL
Address
7901 4th St N #33829, St. Petersburg, FL 33702
Contact
orders@nextdaypeptides.com
Ships from
US
Ships to
US
Categories
peptides
Grade claimed
research
Website
nextdaypeptides.com

WHOIS: Entity name per nextdaypeptides.com: Nextday Sciences LLC scamadviser.com

Find them

V1

Verify you are on nextdaypeptides.com — 1 domain variant exist; this is the one on record as current.

V5 · V6 · V7 · V8 · V9

Products & price

Vendor-listed prices, dated & cited — no ranking, no commission

Product catalog & pricelist

CitedV5

1 listings from the live catalog, captured on 2026-08-30. Prices are vendor-listed and dated; price-per-mg is a unit price, not a ranking. No commission is earned and no vendor is ranked. Research use only.

CompoundPriceSizePrice / mgCOA
GHGHK-CuPeptides
$100——

Price-per-mg snapshot

DerivedV7
No data availableNo price series collected.

Deals & bulk pricing

CitedV8

Price snapshot

DerivedV6
No data availableRequires price data.

Shipping & fulfillment

CitedV9
Ships from
US
Ships to
US
Domestic shipping
Yes
Ship speed
~2 days domestic
Carriers
USPS Ground Advantage
Cost
Free on single vial orders over $300 and box orders over $500
Payment
Zelle · Venmo · Cash App · Link Money · Bitcoin · Check / Money Order

Reship / seizure: Reshipment/replacement handled 'on a case-by-case basis at our sole discretion' after carrier investigation; damaged/defective items must be reported within 48 hours of delivery with photo evidence.

Returns: no returns

nextdaypeptides.com

Watch & alerts

V30
  • Status-change & enforcement alerts
  • Add to a comparison set
V10 · V11 · V12

Quality & COA verification

COA & testing practices

CitedV10

What this vendor proves about identity, purity & potency

Publishes COAs
policy on record
Third-party tested
independent lab
Independent tests tracked
1 on file
GMP / ISO claim
not on record
Operates a public, searchable COA Library that the vendor states currently holds 159 batch-specific certificates, each labeled '≥99% HPLC verified per batch' and tested through two named third-party labs. COAs are described as batch/lot-specific (e.g. Retatrutide Batch 20260212-15 at 99.182%, Tirzepatide Batch 2025116-25 at 99.175%). An editorial reviewer (Cernum Biosciences) notes the practical caveat that searchable COAs are mainly available for box (10-vial) orders, while single-vial COAs may require a support request. No vendor-level catalog breadth is published; a third-party listing (peptides.so) shows ~68 peptides but rates the listing's documentation 0/7 because it is unclaimed and unverified by that platform.

Methods: HPLC purity testing plus fill-weight analysis per batch (vendor-stated). No NMR or MS confirmed.. Labs: Janoshik Analytical, Trustpointe Analytics.

COA repository · published lab results

CompoundLotMethod
Retatrutide (GLP3-R)20260212-15HPLC + fill weight
Tirzepatide (GLP2-T)2025116-25HPLC + fill weight
Semaglutide (GLP-1)—HPLC + fill weight
BPC-157—HPLC + fill weight
TB-500 (Thymosin Beta-4)—HPLC + fill weight
MOTS-C—HPLC + fill weight

Independent test results

CitedV11

1 independent test tracked — labs and findings as reported. No pass/fail tally is computed.

No independent (non-vendor) assay found
As of 2026-06-27 no community/independent lab result (Finnrick, vialaudit, Janoshik public DB synthesis, Reddit testing) was found for Nextday Peptides — the vendor is new (domain registered Nov 2025). The only purity data on record are the vendor's OWN published COAs (attributed to Janoshik Analytical and Trustpointe Analytics); these are vendor-published, not independently re-tested by a neutral party.
nextdaypeptides.com

Authenticity & anti-spoofing

CitedV12

Official domain: nextdaypeptides.com

Only order from the official domain. Research-chem vendors are frequently impersonated by typosquats — verify the URL before purchase.

Known domain variants

  • nextdaypeptides.com — official · Sole known domain; registered 2025-11-12 (registrar Hostinger per search snippet), WHOIS privacy-protected
V13 · V14 · V15 · V16 · V17

Reputation & sentiment

Online sentiment

Community signalUGC · disclaimedV13

Forum sentiment: unknown · unverified

A coarse community read, not a measured score. Platforms can be gamed — corroborate.

Reddit & community

UGC · disclaimedV14

2 community mentions — disclaimed UGC, each linked. Sentiment is reported, not measured.

Cernum Biosciences — 'Best Places to Buy Peptides' editorialMixed2026
Ranks Nextday Peptides 6th of 9 vendors; mixed-positive. Calls its public COA library (linking Janoshik and Trustpointe reports) a transparency plus, but notes searchable COAs are mainly available for box orders while single-vial COAs may require a request, which limits pre-purchase verification.
cernumbiosciences.com
peptides.soNeutral2026
Unclaimed, unverified listing with 0 reviews and a 0/7 documentation scorecard; 'member since March 2026'. Reflects the vendor's newness, not negative customer feedback.
peptides.so

Review sites

UGC · disclaimedV15

5 platforms on record — scores differ by scale; read the notes

Algorithmic trust 0/100 'caution recommended / might be a scam'. Flags: very young domain (~7 months), WHOIS hidden, Netherlands ISP, low Tranco rank, sells prescription-type drugs without prescription. Positive: valid DV SSL, DNSFilter-safe.

Algorithmic 26.1/100 'stay away' (snippet-only — page returned HTTP 403, not directly verifiable). Cites new domain and drug-sale signals.

Algorithmic ~64/100 'mixed trust signals' (snippet-only — page returned HTTP 403). No malware/phishing blacklist hits; flags domain age (~4 months) and drug-sale signals.

Unclaimed listing, 0 reviews, 'member since March 2026', testing scorecard 0/7 (COA/HPLC/MS/sterility/3rd-party/purity/batch all marked incomplete). Lists ~68 peptides. Platform states it does not guarantee accuracy.

Ranks Nextday 6th of 9 vendors; mixed-positive. Praises public COA library linking Janoshik + Trustpointe reports as a transparency plus; dings reduced pre-purchase COA access for single vials.

No Trustpilot profile and no Reddit/forum threads were found (vendor is new — domain registered Nov 2025). The only external reputation signals are algorithmic website-risk checkers, which conflict sharply: ScamAdviser 0/100 'caution recommended', Scam Detector 26.1/100 'stay away', Gridinsoft ~64/100 'mixed', and an unclaimed/unrated peptides.so listing (0 reviews). One editorial peptide blog (Cernum Biosciences) is mixed-positive, praising COA transparency. No genuine customer-review corpus exists yet.

scamadviser.com

User reviews

Not collectedUGC · disclaimedV16
No data availableNo first-party reviews have been collected for this vendor.

Press & media

V17
No press on recordEach item must be cited & verified before it appears
V18 · V19 · V20 · V21

Trust, risk & enforcement

Enforcement & legal history

CitedV18

Warning letters, raids, shutdowns, BBB actions — cited or omitted

No enforcement actions on record. No FDA warning letters, raids, recalls, or import alerts naming this vendor as of 2026-07-08. Absence of record is not a guarantee.

We publish negative records only with a source, and offer vendors a right of reply.

Buyer safety checklist

DerivedV19
  • Publishes COAs
  • Third-party tested
  • Accepts non-crypto payment
  • Has reship / refund policy
  • Clean enforcement record
  • Currently operating

5 of 6 checks clear · derived from vendor-stated data.

Operating status & continuity

CitedV20
Status
Under review
Last confirmed
2026-07-08
US-facing
Yes
Domain history
1 variants on record
Known rebrands / aliases
Migrated to nextdaypeptides.com (2025-11-12)

Entity name per nextdaypeptides.com: Nextday Sciences LLC

If they disappear: prepaid / crypto orders carry no recourse if any research-chem vendor changes domains or shuts down with little notice.

Scam & non-delivery reports

Community-reportedUGC · disclaimedV21
No data availableCommunity scam/non-delivery reports are not collected for this vendor.
V22 · V23 · V24

Compare & discover

Compare vendors

V22

See Nextday Peptides side-by-side with every vendor on the directory — COA practices, testing, shipping, enforcement history.

Similar vendors

CitedV23

By category overlap — listed alphabetically, never ranked

SW
Swiss Chems
US-facing · peptides + GLP analogs with published COAs

Best value for

V24

Cross-vendor price ranking is intentionally not computed

The Trust Index rates each vendor against a fixed evidence rubric — it never ranks vendors against each otheror sorts the directory. Naming a “best-value” vendor per compound would require exactly that cross-vendor sort, so we don’t. Compare the cited price-per-mg in the Products & price table yourself, or open a side-by-side comparison.
V25 · V26 · V27 · V28 · V29 · V31

Compliance, meta & tools

Jurisdiction & legality

CitedV25
Ships to
US
US-facing
Yes
Gating
Commercial links suppress where a compound is restricted in your region

Commercial CTAs are jurisdiction-gated; reference content stays visible everywhere (RUO).

Independence & disclosure

CitedV26
Affiliate
No
Sponsored placement
None
Effect on Trust Index
None — sponsorship & affiliate are excluded by construction

No affiliate or sponsorship relationship on record.

Data confidence & provenance

CitedV27
CandidateReview: needs_review
Reviewed by
PeptideCompass editorial
Sources
27 cited
Captured
2026-06-27
Provenance
web_research + first_party_browse
View 27 sources

FAQ

CitedV31
Is Nextday Peptides legit, and what is on record?
Nextday Peptides (Nextday Sciences LLC, d/b/a Nextday Peptides) is a US-only research-peptide storefront that launched recently — its domain was registered in November 2025. On record: it publishes a searchable batch-COA library citing two named third-party labs (Janoshik Analytical and Trustpointe Analytics), but it is brand-new with no genuine customer-review history, its stated Florida address is a registered-agent/virtual-office location rather than a warehouse, and website-risk checkers conflict (ScamAdviser 0/100 'caution', Scam Detector 26.1/100 'stay away', Gridinsoft ~64/100 'mixed'). PeptideCompass computes no vendor score — weigh the cited facts yourself. Research use only.
scamadviser.com
Where does Nextday Peptides ship, and how fast?
United States addresses only — no international shipping. Orders move via FedEx, UPS or USPS depending on method; standard is USPS 2-Day. The vendor claims same-day fulfillment for orders placed before its ~1:00 PM EST cutoff (Mon–Sat), with overnight available on qualifying Mon–Thu orders. Free shipping applies on Singles orders $300+ and Box orders $500+. Stated US warehouses are in Florida, North Carolina and California. Research use only.
nextdaypeptides.com
What payment methods does Nextday Peptides accept?
The site lists Venmo, Cash App, Zelle, Link Money and Bitcoin. No traditional credit-card checkout or PayPal is advertised, which is typical for research-chemical sellers and means limited card-chargeback recourse. Research use only.
nextdaypeptides.com
Does Nextday Peptides provide COAs or lab tests?
Yes — a public, searchable COA Library that the vendor says holds 159 batch-specific certificates, each marked '≥99% HPLC verified per batch' and attributed to two named third-party labs, Janoshik Analytical and Trustpointe Analytics (HPLC purity + fill-weight analysis). These are vendor-published COAs; no independent (neutral) re-test of Nextday product was found. An editorial reviewer notes searchable COAs are mainly tied to box (10-vial) orders, while single-vial COAs may need a support request. Research use only.
nextdaypeptides.com

Citable summary (GEO)

DerivedV29

Nextday Peptides (nextdaypeptides.com) is a US-facing research-peptide vendor. Publishes COAs and is third-party tested. No enforcement actions on record. PeptideCompass Trust Index: Provisional — Insufficient Data — This listing is under review; the Trust Index is withheld until verification completes.. Data is candidate and dated 2026-07-08. The Trust Index is an evidence-transparency readout of cited facts — not a safety verdict, never sold. Research use only.

JSON-LD: Organization · BreadcrumbList · FAQPage. Computed from cited facts, never sold.

Contribute, report & claim

V28
Reports are moderated · not verified by PeptideCompass