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Head-to-head · same rubric · verified 29 September 2026

Purgo Labs vs Southern Aminos

Q: Is Southern Aminos legit?

Southern Aminos scores 7/10 on our rubric, has an independently viewable rating of 4.7 (188 reviews), and names its lab (Freedom Diagnostics). Caveat: Pricing, the lab-results library and every product page sit behind an age attestation and then a login ('Secure Customer Access'), so a buyer cannot see a price or browse certificates before registering. The one certificate we could open shows 45.08mg on a 50mg label — 90% of label, under our 95% flag line. The homepage claims '250,000+ Satisfied Researchers' and 'vetted cGMP manufacturing partners' with nothing to check either against; the Trustpilot count went from 22 to 188 in eleven days.

Q: Which is cheaper, Purgo Labs or Southern Aminos?

We do not yet have a like-for-like price pair for these two vendors; the Peptide Price Index has each vendor's dated readings.

Q: 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 Southern Aminos. Scores come from the rubric, which has no partnership input, and the ordering rule on our scoreboard is disclosed.

Verdict: Purgo Labs, on the evidence: 10/10 rubric points against 7/10. Southern Aminos is stronger on 3 points listed below.

Our pick · partner

Purgo Labs

4.7 (88 reviews)

Lab: SteriGenix

Non-partner

Southern Aminos

4.7 (188 reviews)

Lab: Freedom Diagnostics

Purgo
ahead on the rubric: 0/0
vials Purgo cheaper at list: 0/0
vials Purgo cheaper after codes: 3
points Southern Aminos is stronger on

We earn nothing from Southern Aminos.Top-scored partner: Purgo Labs 10/1020% off every order with

Visit Purgo Labs

Disclosure: Purgo Labs is our affiliate partner; we earn nothing from Southern Aminos. Scores come from the public rubric, which has no partnership input.

Where each vendor is stronger

Computed from the rubric, prices and review record — never curated

Purgo Labs

COAs and pricing viewable without an account — COAs on product pages without login
No contradictions among its own claims — No contradictions found across site claims (checked Aug 2026)
Vial sizes stated with prices — Product pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record)

Southern Aminos

Larger independent review base: 4.7 (188 reviews) vs Purgo's 4.7 (88 reviews).
Freedom Diagnostics certificate for 5-Amino-1MQ 50mg lot 5A500226B (Search Code Sout2602200108, reported 22 Feb 2026) with a measured net content of 45.08mg; the lab's own lookup returned 'Document found' on 29 Sep 2026.
Legal entity and street address on the contact page: Southern Aminos LLC, 41593 Winchester Road Suite 200, Temecula, CA 92590.

The 10 criteria, side by side

10/10 vs 7/10 · one point each, no weighting

Named lab

Purgo

SteriGenix and Freedom Diagnostics named per lot

Southern

Freedom Diagnostics on the 5-Amino-1MQ 50mg certificate (lot 5A500226B, reported 22 Feb 2026) — read 29 Sep 2026

Lab-hosted COAs

Purgo

Verify-at-lab links to sterigenixanalytical.com / freedomdiagnosticstesting.com

Southern

Certificate prints Search Code Sout2602200108; the lab's lookup at freedomdiagnosticstesting.com returned 'Document found' when we ran it on 29 Sep 2026

Per-lot COAs

Purgo

Lot numbers (e.g. PL-BPC-05) with test dates per batch

Southern

Certificate carries lot 5A500226B; the library itself is behind the login, so only directly linked PDFs could be read

Net content

Purgo

Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)

Southern

Certificate reports Net Content 45.08mg on a 50mg label (90% of label — flagged under our 95% line)

Ungated

Purgo

COAs on product pages without login

SouthernNot awarded

Review base

Purgo

4.7 / 88 on Trustpilot (re-read 18 Sept 2026; was 4.7 / 80 on Trustpilot)

Southern

4.7 / 188 on Trustpilot, claimed (read 29 Sep 2026; 22 reviews on 18 Sep)

Consistent claims

Purgo

No contradictions found across site claims (checked Aug 2026)

SouthernNot awarded

Sized pricing

Purgo

Product pages state vial size with price (e.g. BPC-157 10mg at $44.99; 24 dated size+price readings on record)

SouthernNot awarded

Entity + address

Purgo

PurgoLabs LLC (Arizona) · 10105 E Via Linda St Bld 103, Scottsdale, AZ — on-site (6 Sep 2026)

Southern

Southern Aminos LLC · 41593 Winchester Road Suite 200, Temecula, CA 92590 — contact page (29 Sep 2026)

Clean record

Purgo

No on-site review badge contradicting the independent record; card payment accepted; no regulator action found (checked 6 Sep 2026)

Southern

No on-site review badge; no regulator action found (checked 29 Sep 2026); checkout not reachable from outside

Like-for-like prices

price history across vendors

No compound-and-size pair with dated prices from both vendors yet. Each vendor's readings are on the price index.

What we found at Southern Aminos

Read 29 September 2026 on the vendor's own pages

Southern Aminos has a real lab behind it and a real company in front of it, and hides the part in between. The certificate we could reach is lab-confirmed but under-filled by our line; the price list and the rest of the library need an account; the homepage numbers do not survive a look at Trustpilot. 7/10, and the two missing access points are the ones a buyer needs most.

Checks out

✓Freedom Diagnostics certificate for 5-Amino-1MQ 50mg lot 5A500226B (Search Code Sout2602200108, reported 22 Feb 2026) with a measured net content of 45.08mg; the lab's own lookup returned 'Document found' on 29 Sep 2026. source
✓Legal entity and street address on the contact page: Southern Aminos LLC, 41593 Winchester Road Suite 200, Temecula, CA 92590. source
✓Trustpilot 4.7 across 188 reviews on a claimed profile (29 Sep 2026). source

Could not verify · flags

?A single price — product pages return 'Secure Customer Access' and the shop sits behind an age attestation then a login (29 Sep 2026).
?The lab-results library — /lab-results/ redirects to the landing gate; only a directly linked PDF could be opened.
?'250,000+ Satisfied Researchers' and 'vetted cGMP manufacturing partners' — no basis for the number and no certifying body for the cGMP claim.
!'250,000+ Satisfied Researchers' on the homepage against 188 Trustpilot reviews, and 'vetted cGMP manufacturing partners' with no certifying body named (29 Sep 2026).
!The one certificate we could open shows 45.08mg on a 50mg label — 90% of label, under our 95% flag line.
!Trustpilot review count rose from 22 (18 Sep) to 188 (29 Sep 2026).
!Prices, product pages and the COA library are behind a login; a May 2026 ranking-site post describes a 'very disappointing' experience.

Southern Aminos LLC · 41593 Winchester Road Suite 200, Temecula, CA 92590 · cs@southernaminos.com — contact page (29 Sep 2026). No phone.

Certificates we opened at Southern Aminos

COA library

Certificate of analysis · as we read it

Freedom Diagnostics

Vendor-hosted document

Read 29 Sept 2026

Product

5-Amino-1MQ · 50mg label

Lot / batch

5A500226B

Report ID

Search Code Sout2602200108 (accession 2602200108)

Test date

22 Feb 2026

Purity

—

Measured

45.08mg

Net content vs label90.2% of 50mg

0label 50mg130%

One vial measured.

Under label (<95%)

Verify at the lab Where we opened it Transcribed by Compound Review; the laboratory's report is the record.

Lab lookup run 29 Sep 2026: 'Document found'. 90% of label. The COA library itself is behind the vendor's login; this PDF is directly reachable.

Score history and the caveats

A score only moves when the evidence does

2026-09-297/10 — first assessment (rubric v2); not awarded: ungated, claims-consistent, sized-pricing — prices and COA library behind a login; lab search code confirmed at the lab; certificate shows 45.08mg on a 50mg label

Purgo Labs: the caveat

Smaller independent review base than several competitors (80 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.

Southern Aminos: the caveat

Pricing, the lab-results library and every product page sit behind an age attestation and then a login ('Secure Customer Access'), so a buyer cannot see a price or browse certificates before registering. The one certificate we could open shows 45.08mg on a 50mg label — 90% of label, under our 95% flag line. The homepage claims '250,000+ Satisfied Researchers' and 'vetted cGMP manufacturing partners' with nothing to check either against; the Trustpilot count went from 22 to 188 in eleven days.

Where the evidence points

Purgo Labs 10/10

We earn nothing from Southern Aminos. Purgo Labs holds every rubric point — certificates checkable at the lab, measured net content per lot — with a live, independent review record.

20% off every order with

Visit Purgo Labs

Affiliate links, disclosed. Purgo Labs is our primary partner; we earn nothing from Southern Aminos. Partnership is not a rubric input.

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Questions readers ask

Is Purgo Labs better than Southern Aminos?

Purgo Labs, on the evidence: 10/10 rubric points against 7/10. Southern Aminos 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 Southern Aminos legit?

Southern Aminos scores 7/10 on our rubric, has an independently viewable rating of 4.7 (188 reviews), and names its lab (Freedom Diagnostics). Caveat: Pricing, the lab-results library and every product page sit behind an age attestation and then a login ('Secure Customer Access'), so a buyer cannot see a price or browse certificates before registering. The one certificate we could open shows 45.08mg on a 50mg label — 90% of label, under our 95% flag line. The homepage claims '250,000+ Satisfied Researchers' and 'vetted cGMP manufacturing partners' with nothing to check either against; the Trustpilot count went from 22 to 188 in eleven days.

Which is cheaper, Purgo Labs or Southern Aminos?

We do not yet have a like-for-like price pair for these two vendors; the Peptide Price Index has each vendor's dated readings.

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 Southern Aminos. Scores come from the rubric, which has no partnership input, and the ordering rule on our scoreboard is disclosed.

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