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VendorsBiosynth (US ops / former New England Peptide + Peptides International)
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

Biosynth (US ops / former New England Peptide + Peptides International)

biosynth.comActiveResearch use only

US-facing research-peptide supplier, research; GMP-grade available-grade, founded 1983. Publishes certificates of analysis. Third-party tested. Identity and claims are vendor-stated unless cited. Research use only.

3rd-party testedPublishes COAsGMP claimISO claimDomestic shipping
—products listed
2.6/5Trustpilot (.io)
1983founded
Communityconfidence
2026-06-27 as of
Vendor Trust Index
/100
Thinly Documented

Some cited facts on file, but not enough independently-verified evidence to compute a precise index. No adverse records on file.

Coverage51%
ConfidenceModerate
Cited facts41

A transparency readout of 41 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
2.6/5
Glassdoor (employer reviews) · 33 reviews

COA policy

Cited
Yes
publishes COAs

Operating status

Cited
Active
as of 2026-06-27

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.

Thinly Documented. Cited facts on file, but no allowlisted independent assay yet — a precise index is withheld. 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
No data available
Publishes COAs
Yes
Independent tests tracked
2
Enforcement records
0
Cited sources
41

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
biosynth.com
Payment
Not disclosed
Third-party testing
Yes
Published COAs
Yes
HQ disclosed
US-MA
Sponsored placement
No

Vendor details

CitedV1
Founded (claimed)
1983
HQ
US-MA
Address
65 Zub Lane, Gardner, MA 01440, USA (US peptide HQ); 11621 Electron Drive, Louisville, KY 40299, USA
Contact
peptides@biosynth.com
Ships from
US
Ships to
US, international
Categories
Custom peptide synthesis · Catalog / research peptides · GMP peptides (APIs) · Custom antibodies · Biochemicals & reagents · Stable-isotope-labeled (SIL) bioanalytical peptide standards
Grade claimed
research; GMP-grade available
Website
biosynth.com

WHOIS: The US operations are a roll-up of two long-established US peptide companies — Peptides International (Louisville, KY; founded 1983) and New England Peptide (Gardner, MA; founded 1998) — which merged in late 2019 and were renamed vivitide in early 2021. KKR-backed Biosynth Carbosynth acquired vivitide on 2022-03-17 (Ampersand Capital Partners rolling its stake into the combined group), and all units rebranded to 'Biosynth' on 2022-09-07. 'founded: 1983' reflects the oldest US predecessor; the Swiss parent (Biosynth Holding AG, Staad SG) traces a separate, older lineage (predecessor 'Biochemica & Synthetica', Zurich). Exact WHOIS/registration dates for biosynth.com were not retrievable from snippets. biosynth.com

Find them

V1

Verify you are on biosynth.com — 4 domain variants exist; this is the one on record as current.

V5 · V6 · V7 · V8 · V9

Products & price

Pricing & listings are not in the seed yet — shipping facts are

Product catalog & pricelist

V5
No data availablePrice-per-mg data has not been collected for this vendor.

Price-per-mg snapshot

V7
No data availableNo price series collected.

Deals & bulk pricing

V8
No data availableNo promotional or bulk pricing collected.

Price snapshot

V6
No data availableRequires price data.

Shipping & fulfillment

CitedV9
Ships from
US
Ships to
US, international
Domestic shipping
Yes
Ship speed
No data available
Payment
No data available

biosynth.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
2 on file
GMP / ISO claim
vendor-claimed
Biosynth is a B2B life-sciences supplier / CDMO, not a grey-market consumer reseller; quality is governed by formal certification rather than community purity tests. The US peptide sites operate a QC function with in-process control (IPC) and final-product testing, and GMP batch release of each API is performed in the group's Swiss QC laboratory. The Louisville, KY site is ISO 9001:2015 certified; the group publishes ISO 9001:2015 / ISO 13485:2016 certificates and a Quality Assurance page describing analytical (HPLC/MS) capability. A certificate/analytical data set is supplied per product/batch in the normal B2B course, but no public per-compound COA repository or batch index (of the Swiss Chems / vialaudit kind) was found for the US catalog. Exact COA delivery terms for catalog vs custom orders are unverified from snippets.

Methods: In-house GMP QC using HPLC for purity and Mass Spectrometry for identity (vendor-stated, group Quality Assurance page). 'Third-party' here means independent regulatory/certification audit (US FDA GMP inspection of the Swiss site; ISO certification by SQS) rather than community purity assays such as Janoshik/Finnrick — the brand does not appear in those community testing databases..

COA repository · published lab results

No data availablePer-lot COA records have not been collected.

Independent test results

CitedV11

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

US FDA — GMP inspection (Swiss site)
Group-level, not US-site-specific: Biosynth's Staad, Switzerland site passed a US FDA GMP inspection (reported 2024-01-16) with the site found fully compliant and no findings issued. Evidence of a functioning GMP quality system at the corporate parent; does not by itself certify the Gardner, MA / Louisville, KY catalog-peptide lines.
biosynth.com
SQS (Swiss Association for Quality and Management Systems) — ISO certification
Group ISO 9001:2015 certificate (Global ID 1774168, issued ~2024-04-15) and an ISO 13485:2016 certificate are published as downloadable PDFs; the US Louisville, KY site is named as ISO 9001:2015 certified. Certification of a quality management system, not an independent product-purity assay.
biosynth.com

Authenticity & anti-spoofing

CitedV12

Official domain: biosynth.com

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

Known domain variants

  • biosynth.com — official / current · Unified corporate domain; the US peptide division ('Biosynth International, Inc.', formerly vivitide) operates under it since the Sep 2022 rebrand.
  • vivitide.com — legacy US brand · vivitide was the 2021 merged name of New England Peptide + Peptides International; rebranded to Biosynth on 2022-09-07. Legacy product/info pages were still resolvable at crawl time.
  • carbosynth.com — legacy group brand · From the former 'Biosynth Carbosynth' name (Biosynth + Carbosynth merger); now folded into the Biosynth brand.
  • pepscan.nl — legacy sister-division brand · Pepscan (Lelystad, NL), the other half of Biosynth's peptide division; not the US ops, listed for lineage context.
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
No data availableCommunity mentions are not collected for this vendor.

Review sites

UGC · disclaimedV15

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

EMPLOYEE satisfaction, not customer reviews — ~42% would recommend working there. Not a product/service quality signal.

Algorithmic site-safety checker rates biosynth.com 'legit/safe' (older domain, 40 public facts analysed). Not an endorsement of products.

Algorithmic validator deems biosynth.com a secure, authentic site (high trust score).

Rating A+; not accredited; no complaint count displayed. NEW — not in the existing build profile.

'Not Rated'; not accredited; different address from the Gardner MA / Louisville KY sites already on file — identity ambiguity, see highSeverityClaims.

4.0/5, 4 reviews aggregated from Google for the Gardner, MA location ('Wholesalers' category). The one visible review describes a job-interview experience, not a customer/commerce transaction — same employment-adjacent caveat as the existing Glassdoor entry, not a product/service quality signal. NEW source, low corroborative value.

Biosynth is a B2B supplier, so consumer reputation platforms (Trustpilot, peptide-forum sentiment, Reddit) carry little signal and none was found. The only public sentiment sources are an employer-review site (Glassdoor, 2.6/5 across 33 reviews, ~42% would recommend — staff sentiment, NOT customer sentiment) and algorithmic site-safety checkers (ScamAdviser / Scam Detector both rate biosynth.com legitimate/safe). Reputation here rests on regulatory certifications and trade press rather than crowd reviews.

glassdoor.com

User reviews

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

Press & media

CitedV17
KKR-backed Biosynth Carbosynth Acquires vivitide and Welcomes Ampersand Capital Partners as New Shareholder
BusinessWire / BioSpace · 2022-03-17
biospace.com
Biosynth Carbosynth, vivitide and Pepscan Rebrand to Biosynth
Biosynth (company news) · 2022-09-07
biosynth.com
FDA GMP and Global ISO Inspections successful for Biosynth
Biosynth (company news) · 2024-01-16
biosynth.com
Biosynth Strengthens Position in Peptide Field through Pepceuticals Acquisition
Pharmaceutical Technology · 2023
pharmtech.com
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 2026-06-27. 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
Active
Last confirmed
2026-06-27
US-facing
Yes
Domain history
4 variants on record
Known rebrands / aliases
None on record

The US operations are a roll-up of two long-established US peptide companies — Peptides International (Louisville, KY; founded 1983) and New England Peptide (Gardner, MA; founded 1998) — which merged in late 2019 and were renamed vivitide in early 2021. KKR-backed Biosynth Carbosynth acquired vivitide on 2022-03-17 (Ampersand Capital Partners rolling its stake into the combined group), and all units rebranded to 'Biosynth' on 2022-09-07. 'founded: 1983' reflects the oldest US predecessor; the Swiss parent (Biosynth Holding AG, Staad SG) traces a separate, older lineage (predecessor 'Biochemica & Synthetica', Zurich). Exact WHOIS/registration dates for biosynth.com were not retrievable from snippets.

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 Biosynth (US ops / former New England Peptide + Peptides International) 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

CP
CPC Scientific
US-facing · custom + GMP peptide synthesis CDMO
BI
Bio-Synthesis Inc.
US-facing · custom peptide/oligo synthesis CDMO (distinct company; name collision with Biosynth)

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, international
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
CommunityReview: needs_review
Reviewed by
PeptideCompass editorial
Sources
41 cited
Captured
2026-06-27
Provenance
web_research
View 41 sources

FAQ

CitedV31
Is Biosynth (US ops) legit, and what is on record?
Yes — this is a legitimate, established B2B life-sciences supplier and CDMO, not a grey-market research-chemical storefront. The US peptide operation is the former New England Peptide (Gardner, MA, est. 1998) and Peptides International (Louisville, KY, est. 1983), merged as vivitide in 2021 and acquired by KKR-backed Biosynth in 2022. On record: ISO 9001:2015 certification (Louisville site), a group US FDA GMP inspection passed with no findings (2024), and ISO/GMP certificates published publicly. No FDA warning letter, recall, or scam report was found. PeptideCompass computes no vendor score — weigh the cited facts yourself. Research use only.
biosynth.com
Where are Biosynth's US peptide operations and how do you contact them?
US peptide HQ is 65 Zub Lane, Gardner, MA 01440 (toll free 1-888-343-5974; 1-978-630-0020), with a second site at 11621 Electron Drive, Louisville, KY 40299 (1-502-266-8787). Peptide enquiries: peptides@biosynth.com. The Swiss group parent is Biosynth Holding AG, Staad SG, Switzerland.
biosynth.com
What does Biosynth's US peptide division offer?
Custom peptide synthesis (incl. arrays, PEGylations, native chemical ligation, glycochemistry), catalog/research peptides, GMP-grade peptide APIs, custom polyclonal/monoclonal antibodies, stable-isotope-labeled (SIL) bioanalytical peptide standards, and biochemicals — sold to academia, pharma, biotech and diagnostics. This is research/manufacturing supply, not consumer dosing. Research use only.
biosynth.com
Who owns Biosynth?
Biosynth is owned by, among others, the private-equity firm KKR (which acquired the group in 2021 via its Health Care Strategic Growth Fund II), Ampersand Capital Partners (a substantial minority shareholder that rolled over its vivitide stake in 2022), and senior management led by CEO Dr. Urs Spitz.
biosynth.com

Citable summary (GEO)

DerivedV29

Biosynth (US ops / former New England Peptide + Peptides International) (biosynth.com) is a US-facing research-peptide vendor. Publishes COAs and is third-party tested. No enforcement actions on record. PeptideCompass Trust Index: Thinly Documented — Cited facts on file, but no allowlisted independent assay yet — a precise index is withheld.. Data is community and dated 2026-06-27. 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