Synthesyx Laboratories vs Gold Standard Analytics
Synthesyx Laboratories is a Las Vegas peptide lab offering identity, purity and net content by UHPLC-UV with diode array detection, USP <71> sterility and USP <85> endotoxin, on a certificate carrying a verification hash. Its senior chemists cite reference-material and proficiency-testing backgrounds, and the certificate prints the chromatogram, calibration statistics and system-suitability figures. The differences are in access and scope: intake is by application rather than checkout, identity is by retention time and UV spectral match rather than mass spectrometry, heavy metals go to a partner laboratory, there is no GC-MS offering, and no browsable public library or chain-of-custody evidence.
Synthesyx Laboratories (Synthesyx LLC), Las Vegas, Nevada, USA. synthesyx.com. Facts checked September 10, 2026.
What Synthesyx does well
- Per-component reporting on blends: identity, purity, retention time and net peptide stated for each peptide rather than averaged.
- Chromatographic detail on the certificate: USP tailing factor and plate count for every peak, impurity peaks listed with retention time and area.
- Six-level external standard curve with R² and RSD printed on the certificate, and the growth-promotion control reported on sterility.
- Peak-purity assessment across the peak by diode array to flag co-elution.
- Interim sterility read at 48–72 hours with the 14-day result issued as a revision.
- Plain research-use-only disclaimer and an explicit scope-of-result statement in the footer.
Side by side
| Gold Standard Analytics | Synthesyx Laboratories | |
|---|---|---|
| Location | Gold Standard Analytics5151 Mitchelldale St A10, Houston, Texas; tours by appointment. Prepaid UPS or FedEx label, billed at carrier cost. | Synthesyx Laboratories5965 Harrison Dr Ste 8, Las Vegas, NV 89120. Tours and shipping terms not published. |
| Ordering | Gold Standard AnalyticsSelf-service intake with live quote, instant label, multi-service orders; API, MCP, Telegram and WhatsApp. No application. | Synthesyx LaboratoriesApplication required; the lab states it accepts new clients only when capacity allows. Ordering, pricing and payment happen inside the portal after approval. |
| Published pricing | Gold Standard AnalyticsEvery panel and add-on priced on the public catalog and intake builder before you sign in. | Synthesyx LaboratoriesPrices are on its public pricing page; ordering and payment happen in the portal after approval. |
| Identity method | Gold Standard AnalyticsLC-MS/MS on an Agilent 6490 triple quadrupole, observed m/z within ±0.1 Da, alongside HPLC retention time. | Synthesyx LaboratoriesUHPLC-UV retention time against a characterised standard plus UV spectral match scored out of 1000 (≥990 to conform). No mass spectrometry listed. |
| Purity | Gold Standard AnalyticsHPLC-UV (VWD) at 214 nm on Agilent 1290 Infinity II, reported as area percent. | Synthesyx LaboratoriesUHPLC-UV DAD at 214 nm with peak-purity check, impurity table, USP tailing and plate count per peak. |
| Net content | Gold Standard AnalyticsNet peptide content against a reference standard comes with identity and purity in the $199 HPLC-MS test, the same price for every peptide. | Synthesyx LaboratoriesSix-level external standard curve, mg per vial and percent of label, R² and RSD on the certificate. Price not published. |
| Sterility | Gold Standard AnalyticsUSP <71> 14-day membrane filtration on MilliporeSigma Steritest, $199, one extra unit shared with endotoxin. | Synthesyx Laboratories$175 per vial by methods based on USP <71>, with an interim read at 48 to 72 hours and the 14-day final issued as a revision. (checked October 28, 2026) |
| Endotoxin | Gold Standard AnalyticsUSP <85> kinetic chromogenic LAL on Charles River Endosafe nexgen-PTS, $149, positive product control on the certificate. | Synthesyx Laboratories$150 per vial, LAL run in replicate. (checked October 28, 2026) |
| Heavy metals and solvents | Gold Standard AnalyticsUSP <232>/<233> by Agilent 7850 ICP-MS, $199; residual solvents by GC-MS, USP <467>, $299. | Synthesyx LaboratoriesNot offered; scope is identity, purity, content, sterility and endotoxin. |
| Instruments | Gold Standard AnalyticsAgilent 1290 Infinity II with VWD, Agilent 6490 triple quadrupole, Agilent 7850 ICP-MS, GC-MS, Endosafe nexgen-PTS, Steritest; photographed and named on certificates. | Synthesyx LaboratoriesUHPLC with diode array detector referenced (DAD1A trace shown); makes and models not published. |
| Public results | Gold Standard AnalyticsEvery certificate in a searchable public library by compound, lot or accession, failures and retractions included; a client cannot remove one. | Synthesyx LaboratoriesCertificates verify by hash, QR code and certificate number against the lab register; no browsable library found. |
| Chain of custody | Gold Standard AnalyticsEvery package opened on camera, container photographed, blind-coded; footage retained three years. Your copy of the unboxing and sample-prep video comes with the video add-on ($49 per sample) or a Gold Standard Membership. | Synthesyx LaboratoriesNot published. |
| ISO/IEC 17025 | Gold Standard AnalyticsProcedures modelled on ISO/IEC 17025 with GLP-style data integrity. Not accredited. | Synthesyx LaboratoriesCites 30 years writing and auditing ISO quality systems; no accreditation claimed or scope certificate linked. |
| Refunds | Gold Standard AnalyticsSee the refund policy for the remedies that apply to your order. A confirmed error of ours is corrected publicly, and credited or refunded if it can’t be fixed. | Synthesyx LaboratoriesNone published; the site says its turnaround figures are the ones it works to. |
Sources: synthesyx.com footer, checked Sep 10, 2026; synthesyx.com, Intake and capacity section, Sep 10, 2026; synthesyx.com, checked Sep 10, 2026; synthesyx.com, What we test, Sep 10, 2026; synthesyx.com/verify, Sep 10, 2026; synthesyx.com, Behind the certificate, Sep 10, 2026.
Published prices
| Test | Gold Standard Analytics | Synthesyx Laboratories |
|---|---|---|
| Identity and purity, one peptide | Gold Standard Analytics$129 $199 with net content; same price for GLP-1s and blends | Synthesyx Laboratories$200 GLP-1 class $275 |
| Endotoxin | Gold Standard Analytics+$149 USP <85> | Synthesyx Laboratories$150 |
| Sterility | Gold Standard Analytics+$199 USP <71>, 14-day | Synthesyx Laboratories$175 based on USP <71> |
| Heavy metals | Gold Standard Analytics+$199 ICP-MS | Synthesyx Laboratories$150 |
| Certificate check | Gold Standard AnalyticsAccession or QR at /verify | Synthesyx LaboratoriesQR or hash lookup |
Checked October 28, 2026. Synthesyx Laboratories prices from its own website (synthesyx.com/pricing, synthesyx.com/verify, synthesyx.com/terms); Gold Standard Analytics prices from peptide testing cost. Prices are per sample for a standard research peptide and exclude shipping; confirm current prices with each laboratory.
About Synthesyx Laboratories
From Synthesyx Laboratories's own website, checked October 28, 2026.
Where is Synthesyx Laboratories located?
5965 Harrison Dr, Suite 8, Las Vegas, NV 89120.
How much does Synthesyx Laboratories charge for peptide testing?
$200 standard assay: identity by UHPLC-UV retention time, purity and net peptide content on one certificate; GLP-1 class $275. Endotoxin: $150 per vial, LAL run in replicate. Sterility: $175 per vial by methods based on USP <71>, with an interim read at 48 to 72 hours and the 14-day final issued as a revision.
How do you verify a Synthesyx Laboratories certificate?
Enter the 64-character verification hash printed on the certificate, or scan its QR code, at its open verification register. (synthesyx.com/verify) Check a certificate with the laboratory that issued it; Gold Standard Analytics certificates resolve at /verify.
Is Synthesyx Laboratories accredited?
Its site makes no ISO/IEC 17025 claim. Gold Standard Analytics is not ISO/IEC 17025 accredited.
Questions about Synthesyx Laboratories and Gold Standard Analytics
Is Gold Standard a Synthesyx alternative?
Yes. Both test research peptides for identity, purity, net content, USP <71> sterility and USP <85> endotoxin with a hash-verifiable certificate. Gold Standard adds mass-spectrometric identity, ICP-MS heavy metals, GC-MS solvents, published prices, self-service ordering, a browsable public library and video-recorded custody at our Houston lab.
How do I order testing from Synthesyx?
You apply for an account; Synthesyx says it accepts new clients only when it can absorb the volume without moving other clients' dates. Once approved you order and pay in its portal. Gold Standard has no application: build the order, see the quote, pay and print the prepaid label in one session.
How much does Synthesyx charge?
Synthesyx publishes a rate card at synthesyx.com/pricing: $200 for identity, purity and net content ($275 for the GLP-1 class), $150 endotoxin, $175 sterility and $150 heavy metals. Gold Standard charges one flat price for any peptide or blend, GLP-1s included: $129 per sample for HPLC-MS identity and purity, or $199 with net content (mg per vial).
Does Synthesyx use mass spectrometry for identity?
Its published identity method is UHPLC-UV retention time plus a UV spectral match scored out of 1000. Gold Standard confirms identity by LC-MS/MS on an Agilent 6490 triple quadrupole (±0.1 Da) in addition to retention time, which distinguishes peptides with similar UV spectra.
Does Synthesyx test heavy metals?
No. Its scope is identity, purity, content, sterility and endotoxin. Gold Standard runs USP <232>/<233> heavy metals by ICP-MS for $199 on the same accession.
Can I verify a Synthesyx COA here?
No. Synthesyx certificates verify at synthesyx.com/verify by the hash printed on the certificate. Gold Standard certificates verify here by accession number and are listed in a public library anyone can browse.
Where is Synthesyx located?
Synthesyx LLC lists 5965 Harrison Dr Ste 8, Las Vegas, NV 89120. Gold Standard operates from 5151 Mitchelldale St A10, Houston, TX 77092, with tours by appointment.
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Submit a sample
Prepaid domestic label, public certificate, filmed chain of custody.