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: 10
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: Venmo · Cash App · Zelle · Link Money · Bitcoin
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 · GLP analogs · Research compounds
Grade claimed: research
Website: nextdaypeptides.com

WHOIS: Entity name per nextdaypeptides.com: Nextday Sciences LLC d/b/a Nextday Peptides scamadviser.com

Find them

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

10 representative listings captured on 2026-07-08. 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.

Compound	Price	Size	Price / mg
BPBPC-157Peptides	$53.50	5 mg vial	$10.70
TBTB-500 (Thymosin Beta-4)Peptides	$80.25	lyophilized; 'from' (lowest-variant) price	—
SESemaglutide (GLP-1)GLP analogs	$80.25	lyophilized; 'from' (lowest-variant) price	—
TITirzepatide (GLP2-T)GLP analogs	$128	single vials 30–60 mg; boxes 5–90 mg (10 vials); 'from' price	—
RERetatrutide (GLP3-R)GLP analogs	$123	lyophilized; 'from' (lowest-variant) price	—
IPIpamorelinPeptides	$85.60	lyophilized; 'from' (lowest-variant) price	—
SESermorelin (GHRH)Peptides	$104	lyophilized; 'from' (lowest-variant) price	—
GHGHK-Cu (Copper Peptide)Peptides	$96.30	lyophilized; 'from' (lowest-variant) price	—
SESelankPeptides	$48.15	lyophilized; 'from' (lowest-variant) price	—
FOFOXO4 (FOXO4-DRI)Peptides	$1304	lyophilized; 'from' (lowest-variant) price	—

Prices captured 2026-06-27 from the live catalog; most catalog entries display a 'from' (lowest-variant) starting price, so per-mg values are not computed except BPC-157 5 mg vial ($53.50 = $10.70/mg). Products ship as lyophilized vials, with single-vial and 10-vial 'box' options. Catalog prominently includes GLP analogs (semaglutide, tirzepatide, retatrutide) — the same drug class that drew FDA warning letters to several peer vendors in Dec 2024, and tirzepatide is covered by a source-agnostic USITC General Exclusion Order regardless of seller.

Price-per-mg snapshot

DerivedV7

First dated snapshot (2026-07-08) — price-per-mg across the catalog. A trend line builds as we re-capture; no time series exists yet.

Log scale — bars are spaced so values spanning orders of magnitude stay readable.

BPC-157$10.70/mg

Deals & bulk pricing

CitedV8

10OFF10% off box orders (10 vials only) + free shipping nextdaypeptides.com
Newsletter signup for product updates, restock notices and subscriber-only deals nextdaypeptides.com

Price snapshot

DerivedV6

Lowest $/mg: $10.70
Median $/mg: $10.70
Highest $/mg: $10.70

Across 1 priced listings — cheapest BPC-157 ($10.70/mg), priciest BPC-157 ($10.70/mg). This vendor’s own catalog spread — not a cross-vendor ranking.

Shipping & fulfillment

CitedV9

Ships from: US
Ships to: US
Domestic shipping: Yes
Ship speed: ~2 days domestic
Carriers: FedEx, UPS, and USPS depending on method/fulfillment location. Standard = USPS 2-Day. Same-day fulfillment claimed for orders placed before the daily cutoff (~1:00 PM EST, Mon–Sat); overnight available on qualifying Mon–Thu orders; Friday overnight orders arrive Monday.
Cost: Free on single vial orders over $300 and box orders over $500
Payment: Venmo · Cash App · Zelle · Link Money · Bitcoin

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 fixed return policy stated; refunds, store credits and replacements are 'handled on a case-by-case basis at our sole discretion.'

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

Compound	Lot	Method
Retatrutide (GLP3-R)	20260212-15	HPLC + fill weight
Tirzepatide (GLP2-T)	2025116-25	HPLC + 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

ScamAdviser—

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.

Scam Detector—

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

Gridinsoft—

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.

peptides.so (supplier directory)0.0(0)

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.

Cernum Biosciences (editorial review)—

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 d/b/a Nextday Peptides

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

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

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