I have not placed an order with Swiss Chems. This profile is built from a full read of their site and a sweep of their certificate library, with one report compared field by field against the testing lab's own record.
Who this vendor is
The most contactable company in this field. They publish a street address at 42 Broadway in New York, a phone number in the header of every page, a support email on their own domain, business hours, and a structured contact form with inquiry routing. Nobody else here publishes all of that, and most publish none of it.
They also run a product authenticity system: a silver scratch panel on the lid concealing a ten-character code, checkable on their site, with a notice to resellers that only products carrying a valid serial will be regarded as authentic. Worth being precise about what that does, though. It verifies that a unit is genuine. It does not tell you which lot it came from, so it does not close the gap between a published report and the vial in your hand.
What is missing is a legal entity. No registered company name, no state of incorporation, no company number appears on the contact, terms, or quality pages. "Swiss Chems" is a trade name, and the Broadway address is given without a suite-holder.
Their domain was registered in January 2012, which is six years older than the 2018 founding date they claim. That is the opposite of the usual pattern, where a domain turns out younger than the claim, and it does not confirm the date either way.
Third-party testing and COAs
This is genuinely the best certificate presentation in the field, and it deserves to be said clearly before the criticism starts.
Their library is searchable, filterable by category, sortable, and five pages deep. Each card links two documents: a copy hosted by Swiss Chems, and the live record on the testing lab's own server. Every other vendor in this batch hosts its own copies, and in two cases those copies turned out to differ from the lab's records. Publishing both side by side is the only arrangement that lets a buyer detect that themselves, and Swiss Chems is the only vendor doing it.
They are also the first vendor here to publish repeat testing of the same product over time rather than a single snapshot. MK-677 carries five reports spanning two batches. The BPC-157 and TB-500 blend carries four. The library spans May to July 2026, with the newest report six weeks old at the time of this pass, making it the freshest library of the twelve.
The coverage is the problem: 33 products out of 134, about a quarter. Their stated policy is a certificate "for every lot upon request," which is provision, not publication, and only the published quarter can be checked before ordering.
The numbers themselves, where they exist, are good. Their BPC-157 with Arginine Salt report gives 5.19 mg against a 5 mg label and a purity of 99.936 percent, which is the tightest label agreement I recorded anywhere in this batch.
The raw chromatogram, which cuts both ways
Their MK-677 report is worth reading closely, because page three is the raw instrument output from the lab's software, and no other vendor in this field publishes that rather than a summary.
In their favour: publishing it at all is unusual and checkable, and their summary figure of "98%+" is more conservative than the chromatogram's own 100.000 percent area result. They are not inflating.
Against: a three-minute run producing a single peak is a short screening method, the method filename literally translates as "short methods," and a 100 percent area result from that window is weak support for a 99 percent purity guarantee, because closely-eluting impurities would not resolve in three minutes. The lab's own summary says "98%+" rather than a number, which is consistent with a screen rather than a full purity assay. And 98 percent is below the 99 percent the site guarantees.
One further gap on that same report: the assay was run on 1.109 mg of powder weighed into a solvent, which quantifies the material submitted. The product is sold as 10mg per capsule in a 60-capsule bottle, and no published report states a per-capsule figure.
What the certificates do not cover
Heavy metals and contamination results are qualitative. The heavy metals report returns "not detected" for arsenic, cadmium, lead and mercury with no limit of detection, no limit of quantitation, and no numeric value, so "not detected" cannot be compared against any specification. The contamination screen has an entirely empty results table, with its finding living only in the comments field: mannitol, TB-500 and degradation products identified, no significant contamination detected. Degradation products are disclosed but not quantified, and "no significant" is the lab's judgment with no stated threshold.
One identity note. The newer reports name Swiss Chems as client. Older ones name "Anonymous" as client while still naming Swiss Chems as manufacturer, so the vendor is on the document either way. The MK-677 report inverts it: client is Swiss Chems, manufacturer is recorded as "Unknown." And the batch identifier on the TB-500 reports reads "Test-CY3," which looks like a test batch rather than a production lot.
Claims against evidence
This is where the vendor comes apart, and the gap is not subtle.
"99% Purity Guaranteed" appears on the homepage, in the hero, and as a badge on every product page I checked. Their TB-500 page carries it and links three reports, none of which measures purity. Their Orforglipron page, at $198.95 one of the newest and most expensive items in the catalog, carries the badge, a "Lab Tested, every batch is tested for purity, potency and quality" band, and a Check Lab Report button that does nothing because no report exists for it.
Their own quality-assurance page states the claim correctly: "We guarantee ≥99% purity for all products where specified." Those three words are the entire difference between an accurate claim and an inaccurate one, and they appear nowhere a customer shopping the site would encounter them.
"All products are tested by independent, ISO-accredited laboratories." One laboratory, not laboratories. And no ISO accreditation appears anywhere on Janoshik's own site, which describes its work without claiming accreditation, certification, or a scope. A claim of accreditation is specific and checkable, and this one is not supported by the party supposedly accredited.
"30-day hassle-free returns on unopened products," on product pages, against a formal policy that allows 7 business days, excludes peptides entirely, and deducts a 15 percent restocking fee plus $25 processing on a cash refund. The badge overstates the window more than fourfold and omits both the exclusion and the fees. This is the clearest consumer-facing misstatement on the site.
Same-day shipping cutoff, given as 2PM EST on product pages and 12PM EST on the contact page.
Credit where the site is genuinely better than its competitors
Their quality-assurance page sets out a real process for customers who independently test a product and disagree with the result: contact support within 30 days with order, product, lot number and issue, submit a complete third-party report including the lab's name and contact, the method used, the dates of receipt and analysis, and the purity value with chromatogram, then a 7 to 10 business day review that may include testing retained reference samples, with replacement, credit, refund or reimbursement as outcomes. It even sets sample-handling conditions.
Nothing remotely comparable exists at any other vendor in this batch. A company inviting customers to bring their own lab results, and publishing the procedure, is not behaving like one with something to hide.
Research-use labeling
The strongest of the twelve. Every product page carries a bordered notice above the fold, before the price, stating the product is for research purposes only, that introduction into humans or animals is prohibited, and that it should only be handled by licensed and qualified professionals. A Research Use Only badge sits in the trust-badge row. The footer carries an FDA disclaimer, and the contact form requires an explicit acknowledgement tick before submission.
None of the consumer-facing drift found at other vendors appears here. Category names are stated in research terms rather than as outcomes.
One qualification worth stating plainly: the catalog includes aromatase inhibitors and related compounds such as letrozole, anastrozole and enclomiphene, alongside T3, HCG and HMG. That is a product mix that exists because of demand that is not research demand, whatever the labeling says. The labeling is not undermined by any copy on the site. It is in tension with the shelf.
Pricing and value
The cheapest vendor in this entire field, by a wide margin. BPC-157 with Arginine Salt at $49.99, on sale at $39.99, against $119.00 for BPC-157 at Spartan. TB-500 at $29.95. Multi-vial variants drop the unit cost further.
Live Visa and Mastercard processing for US-issued cards is itself a meaningful signal, because card acquirers in this category are difficult to obtain and keep, and it gives buyers a chargeback route that ACH, Zelle and crypto do not.
Where they fall short
- A purity guarantee on products with no purity test. TB-500 and Orforglipron both carry the badge with nothing behind it. The vendor's own quality page proves they know how to state this accurately.
- An ISO accreditation claimed for a lab that does not claim one. Specific, checkable, and unsupported.
- The returns badge is flatly wrong. 30 days hassle-free on the product page against 7 business days, peptides excluded entirely, and two separate fees in the actual policy.
- Three quarters of the catalog has no published certificate, including the newest and most expensive product.
- No usable community sentiment. Their Trustpilot profile was removed for guideline violations, and the only other profile belongs to a different domain under a different name. There is no independent read on this vendor at all.
- No legal entity named, on an otherwise unusually transparent site.
Who this vendor is a good fit for
Someone who will click through to the lab's live record rather than trusting the badge. If you do that, this vendor gives you more to work with than anyone else in the field: two copies of every certificate, repeat testing over time, raw instrument data at least once, the freshest library here, a real returns-dispute process, a phone number, an address, and the lowest prices available.
If you shop by the badges on the product page, this is the vendor most likely to mislead you, because those badges are the least accurate part of the operation.
Bottom line
Swiss Chems inverts the usual shape of these findings. Across most of this field the marketing outruns thin documentation. Here the documentation infrastructure is the best available and the marketing copy sitting on top of it is the least accurate I checked.
That is, genuinely, a better problem to have, because copy is fixable and a testing program is not. Three words on their own quality page, "where specified," would make the purity claim honest. Dropping "ISO-accredited" would make the lab claim honest. Correcting the returns badge to match their own policy would fix the worst of it. None of that requires changing a single thing about how they actually test.
Until they do it, check the report before you check the badge, and confirm that the specific product you want has a purity test on file rather than assuming the guarantee covers it.