Disclosure: Purgo Labs is our affiliate partner; we earn nothing from Peak Lab Peptides. Scores come from the public rubric, which has no partnership input.
Research use only. Compound Review scores vendors on documentation — laboratory certificates, lot records, pricing and company identity. Nothing on this page is guidance on human or veterinary use, dosing or health outcomes.
01
Where each vendor is stronger
Computed from the rubric, prices and review record — never curated
Purgo Labs
Batch-specific COAs matched to lots — Lot numbers (e.g. PL-BPC-05) with test dates per batch
Independent review base (50+ on an external platform) — 4.7 / 101 on Trustpilot, claimed; three reviews below four stars, all replied to (complaint read 9 Oct 2026; was 4.7 / 99 on 2 Oct)
No contradictions among its own claims — No contradictions found across site claims (checked Aug 2026)
Publishes a legal entity and street address — PurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)
No misleading trust signals or buyer-protection workarounds — No on-site review badge contradicting the independent record; card payment accepted; no regulator action found (checked 6 Sep 2026)
Lower list price on 10 of 12 like-for-like rows.
Larger independent review base: 4.8 (101 reviews) vs none on record.
Peak Lab Peptides
Lower list price on 2 of 12 like-for-like rows we have on record (see table).
Bioviridian (College Station, TX) printed on all 48 reports on the public COA page and on the two certificates we opened (BPC-157 COA6663, retatrutide COA6671) — read 25 Oct 2026
Bioviridian's own site served COA6663 and COA6671 as PDFs from bioviridians.com/coas/ when we entered the codes on its COA search on 25 Oct 2026; the content, purity and dates match the vendor's copies (the lot fields do not — see claims-consistent)
02
The 10 criteria, side by side
10/10 vs 5/10 · one point each, no weighting
Named lab
PurgoSteriGenix and Freedom Diagnostics named per lot
SteriGenix and Freedom Diagnostics named per lot
PeakBioviridian (College Station, TX) printed on all 48 reports on the public COA page and on the two certificates we opened (BPC-157 COA6663, retatrutide COA6671) — read 25 Oct 2026
Bioviridian (College Station, TX) printed on all 48 reports on the public COA page and on the two certificates we opened (BPC-157 COA6663, retatrutide COA6671) — read 25 Oct 2026
Lab-hosted COAs
PurgoVerify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
Verify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com
PeakBioviridian's own site served COA6663 and COA6671 as PDFs from bioviridians.com/coas/ when we entered the codes on its COA search on 25 Oct 2026; the content, purity and dates match the vendor's copies (the lot fields do not — see claims-consistent)
Bioviridian's own site served COA6663 and COA6671 as PDFs from bioviridians.com/coas/ when we entered the codes on its COA search on 25 Oct 2026; the content, purity and dates match the vendor's copies (the lot fields do not — see claims-consistent)
Per-lot COAs
PurgoLot numbers (e.g. PL-BPC-05) with test dates per batch
Lot numbers (e.g. PL-BPC-05) with test dates per batch
PeakNot awarded
Net content
PurgoMeasured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
PeakLab copy of COA6663 reports 10.65 mg on a 10 mg BPC-157 label (106.5%), purity 99.7%; COA6671 reports 10.38 mg on a 10 mg retatrutide label, 99.7% — read at the lab on 25 Oct 2026
Lab copy of COA6663 reports 10.65 mg on a 10 mg BPC-157 label (106.5%), purity 99.7%; COA6671 reports 10.38 mg on a 10 mg retatrutide label, 99.7% — read at the lab on 25 Oct 2026
Ungated
PurgoCOAs on product pages without login
COAs on product pages without login
PeakCatalog, prices and the COA page readable without an account; prices read from the public Store API (25 Oct 2026)
Catalog, prices and the COA page readable without an account; prices read from the public Store API (25 Oct 2026)
Review base
Purgo4.7 / 101 on Trustpilot, claimed; three reviews below four stars, all replied to (complaint read 9 Oct 2026; was 4.7 / 99 on 2 Oct)
4.7 / 101 on Trustpilot, claimed; three reviews below four stars, all replied to (complaint read 9 Oct 2026; was 4.7 / 99 on 2 Oct)
PeakNot awarded
Consistent claims
PurgoNo contradictions found across site claims (checked Aug 2026)
No contradictions found across site claims (checked Aug 2026)
PeakNot awarded
Sized pricing
PurgoProduct pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record)
Product pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record)
PeakEvery listing states milligrams with its price (BPC-157 5mg $33.40 / 10mg $54.40; TB-500 10mg $54.00; 'GLP-3' 10mg $95.00; NAD+ 500mg $56.00), read 25 Oct 2026
Every listing states milligrams with its price (BPC-157 5mg $33.40 / 10mg $54.40; TB-500 10mg $54.00; 'GLP-3' 10mg $95.00; NAD+ 500mg $56.00), read 25 Oct 2026
Entity + address
PurgoPurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)
PurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)
PeakNot awarded
Clean record
PurgoNo on-site review badge contradicting the independent record; card payment accepted; no regulator action found (checked 6 Sep 2026)
No on-site review badge contradicting the independent record; card payment accepted; no regulator action found (checked 6 Sep 2026)
Only vials both vendors list at the same size, read on each vendor's product page on the date shown. "After code" is list × the code's stated discount — a calculation, labelled as one; stacking with sale pricing is not cart-tested.
04
What we found at Peak Lab Peptides
Read 25 October 2026 on the vendor's own pages
The rest: Peak Lab Peptides LLC is named in the terms, with Watertown, SD 57201 and a phone number but no street address. The About page says 'accredited laboratories'; Bioviridian does not claim accreditation. Semaglutide, tirzepatide and retatrutide sell as 'GLP-1 S', 'GLP-1 T' and 'GLP-3', named only on the COA page. Prices are open and every line is shown at about 20% off a struck list price, so the sale price is the real price. Five of ten.
Evidence ledger · read 25 October 2026
5 verified2 contradictions1 flag4 could not verify
Verified — what we opened, with the date
VerifiedBioviridian (College Station
TX) printed on all 48 reports on the public COA page and on the two certificates we opened (BPC-157 COA6663, retatrutide COA6671) — read 25 Oct 2026
—
VerifiedBioviridian's own site served COA6663 and COA6671 as PDFs from bioviridians.com/coas/ when we entered the codes on its COA search on 25 Oct 2026; the content, purity and dates match the vendor's copies (the lot fields do not — see claims-consistent)
—
VerifiedLab copy of COA6663 reports 10.65 mg on a 10 mg BPC-157 label (106.5%), purity 99.7%
COA6671 reports 10.38 mg on a 10 mg retatrutide label, 99.7% — read at the lab on 25 Oct 2026
—
VerifiedCatalog, prices and the COA page readable without an account
prices read from the public Store API (25 Oct 2026)
—
VerifiedEvery listing states milligrams with its price (BPC-157 5mg $33.40 / 10mg $54.40
Contradiction — the vendor's claims disagree with each other or with the evidence
ContradictionCOA page
every report is 'published exactly as received — no cherry-picking, no modifications'. The lab's copies of COA6663 and COA6671 carry different lot numbers from the vendor's copies, and the vendor's retatrutide copy adds a vial photo.
—
ContradictionAbout page
'tested by accredited laboratories'. Bioviridian's site makes no accreditation claim.
—
Flag — read before ordering
FlagTrustpilot has removed the peaklabpeptides.com profile
('goes against our guidelines', read 25 Oct 2026), while the site header shows a 4.9 rating across 516 'Researcher Reviews' from WiserReview, a review app the vendor installs and manages. The COA page says every report is 'published exactly as received — no cherry-picking, no modifications', but on the two certificates we compared, the lot number on the vendor's copy differs from the lab's copy (NA and RT-202602-001 at the lab; BC-202607-001 and RT-202607-001 on the site), and the glutathione entry is coded 202701, a month that has not happened. The About page says 'accredited laboratories'; Bioviridian claims no accreditation. No street address: the contact page gives Watertown, SD 57201 and a phone. Semaglutide, tirzepatide and retatrutide are sold as 'GLP-1 S', 'GLP-1 T' and 'GLP-3', with the compound named only on the COA page. Finnrick has no completed tests. Payment rails not examined.
—
Could not verify — not on the record either way
Could not verifyWhy the lot numbers differ between the lab's copies and the vendor's
Bioviridian's PDF for COA6663 reads 'NA' and for COA6671 reads 'RT-202602-001'; the vendor's copies read BC-202607-001 and RT-202607-001. We can see the discrepancy, not who made it or why (25 Oct 2026).
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Could not verifyAn independent review record
Trustpilot has removed the profile. The 516 on-site reviews are served by WiserReview, an app the vendor installs. Finnrick has no completed tests.
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Could not verifyA street address
the contact page gives Watertown, SD 57201 and a phone number only.
—
Could not verifyPayment rails
not examined.
—
Peak Lab Peptides LLC, a South Dakota limited liability company, named in the terms (effective 1 Oct 2025, updated 30 Sep 2026). Contact page: Watertown, South Dakota 57201, 605-524-2800, support@peaklabpeptides.com. No street address on any page we read (25 Oct 2026).
Check it yourself: Bioviridian Inc. (College Station, TX) hosts certificates at bioviridians.com/coas/COA<number>.pdf and runs a COA search on its site; the certificate prints a verification code (e.g. COA5346). No accreditation claimed (24 Oct 2026). The button above opens the lab's lookup.
Sample received 16 Jul, issued 23 Jul 2026. The lab's PDF (bioviridians.com/coas/COA6663.pdf) and the vendor's image agree on content, purity, dates and vendor name; the lab's lot field reads NA, the vendor's reads BC-202607-001.
Other certificates we opened at Peak Lab Peptides: 1
2 verifiable at the lab2 state measured massmedian purity 99.70%median fill 105.1% of labellast read 2026-10-25
Product · lot
Lab
Purity
Measured vs label
Verify
Retatrutide 10mglot RT-202602-001 at the lab; RT-202607-001 on the vendor's copy · tested 23 Jul 2026
Each row is a certificate we opened and read ourselves; "verify at the lab" goes to the laboratory's own lookup, never a copy we host. Full COA library →
Where Peak Lab Peptides ranks by compound
Peak Lab Peptides appears in 12 of our compound rankings. Each ranking orders every scored vendor that sells the compound by rubric score, then verified price per mg.
25 Oct 20265/10 — first assessment (rubric v2); not awarded: per-lot (the lot numbers on the vendor's copies do not match the lab's record: NA and RT-202602-001 at Bioviridian versus BC-202607-001 and RT-202607-001 on the site, so a vial cannot be matched to a report), review-base (Trustpilot profile removed — 'goes against our guidelines' — 25 Oct 2026; the 516 on-site reviews come from a vendor-installed app), claims-consistent ('published exactly as received — no modifications' versus lot numbers that differ from the lab's copies; 'accredited laboratories' versus a lab that claims no accreditation), identity (Peak Lab Peptides LLC named, but only a city and ZIP, no street address), clean-record (a 4.9/516 badge from a vendor-managed review app sits in the header while Trustpilot has removed the profile; the badge cannot be compared with any independent record)
Purgo Labs: the caveat
Smaller independent review base than several competitors (101 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
Peak Lab Peptides: the caveat
Trustpilot has removed the peaklabpeptides.com profile ('goes against our guidelines', read 25 Oct 2026), while the site header shows a 4.9 rating across 516 'Researcher Reviews' from WiserReview, a review app the vendor installs and manages. The COA page says every report is 'published exactly as received — no cherry-picking, no modifications', but on the two certificates we compared, the lot number on the vendor's copy differs from the lab's copy (NA and RT-202602-001 at the lab; BC-202607-001 and RT-202607-001 on the site), and the glutathione entry is coded 202701, a month that has not happened. The About page says 'accredited laboratories'; Bioviridian claims no accreditation. No street address: the contact page gives Watertown, SD 57201 and a phone. Semaglutide, tirzepatide and retatrutide are sold as 'GLP-1 S', 'GLP-1 T' and 'GLP-3', with the compound named only on the COA page. Finnrick has no completed tests. Payment rails not examined.
07
Where the evidence points
Where the evidence points
Purgo Labs 10/10
We earn nothing from Peak Lab Peptides. Purgo Labs holds every rubric point — certificates checkable at the lab, measured net content per lot — and is cheaper after codes on 12 of 12 like-for-like vials.
Purgo Labs, on the evidence: 10/10 rubric points against 5/10. Peak Lab Peptides is stronger on 3 points listed below. Every point is a fact you can check on either vendor's site; both are scored by the same published rubric.
Is Peak Lab Peptides legit?
Peak Lab Peptides scores 5/10 on our rubric, has no independent record (its Trustpilot profile has been removed), and names its lab (Bioviridian (on certificates)). Caveat: Trustpilot has removed the peaklabpeptides.com profile ('goes against our guidelines', read 25 Oct 2026), while the site header shows a 4.9 rating across 516 'Researcher Reviews' from WiserReview, a review app the vendor installs and manages. The COA page says every report is 'published exactly as received — no cherry-picking, no modifications', but on the two certificates we compared, the lot number on the vendor's copy differs from the lab's copy (NA and RT-202602-001 at the lab; BC-202607-001 and RT-202607-001 on the site), and the glutathione entry is coded 202701, a month that has not happened. The About page says 'accredited laboratories'; Bioviridian claims no accreditation. No street address: the contact page gives Watertown, SD 57201 and a phone. Semaglutide, tirzepatide and retatrutide are sold as 'GLP-1 S', 'GLP-1 T' and 'GLP-3', with the compound named only on the COA page. Finnrick has no completed tests. Payment rails not examined.
Which is cheaper, Purgo Labs or Peak Lab Peptides?
On the 12 compound-and-size rows where we have dated prices from both, Peak Lab Peptides lists lower on 2 and Purgo Labs on 10. Purgo's list prices drop 20% with code HEALTH.
Do you earn money from either vendor?
Purgo Labs is our affiliate partner and we earn a commission on referred orders; we earn nothing from Peak Lab Peptides. Scores come from the rubric, which has no partnership input, and the ordering rule on our scoreboard is disclosed.
