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Retatrutide (Analytical Reference Material) — 20mg
Product analysis · SPX Labs

Retatrutide (Analytical Reference Material) — 20mg

20 mg per vial of Retatrutide (Analytical Reference Material) — 20mg, sold by SPX Labs. An analytical report is on file from Janoshik Analytical, showing 99.531% purity. For laboratory research use only.

Why this score?
Testing & analytical evidence
37/45
Value
24/25
Product identity
15/15
Supplier transparency
6/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing transparency: 37/45
Out Of StockSPX Labs
20 mgVial size
1Vials per pack
Out Of StockPrice / vial
Out Of StockPrice / mg
View SupplierCompare alternatives

We may earn a commission from qualifying purchases. This never affects our scores. Research-use product only - not for human or veterinary use.

The score, explained

Our scoring methodology
Testing & analytical evidence82/100
37 of 45 points
Value95/100
23.9 of 25 points
Product identity100/100
15 of 15 points
Supplier transparency60/100
6 of 10 points
Label & listing transparency100/100
5 of 5 points

Overall: 86.9/100 - Strong. The score compares the documentation and characteristics of this research product - not whether a peptide is safe, effective or suitable for human use. Affiliate commission contributes no points.

Testing & evidence

Verified independent evidence

Evidence status
Verified independent evidence
Manufacturer statement
Product page: “Batch-identifiable with supporting analytical documentation available where applicable.” COA library: “Review available SPX Labs batch-specific analytical documentation and independent third-party laboratory results.” Retatrutide batch page: “Independent Third-Party Analytical Results”; “Laboratory: Janoshik Analytical”; “Identity, Peptide Content & Purity.”
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
SPX-RT20-001
Batch-specific report
Recorded
Report date
2026-04-16
Evidence checked
2026-09-21
Purity (HPLC)
99.531%
Chromatogram
Not shown
Identity / mass spectrometry
Not shown
Measured content
Within 1% of label
Lab verification
No public verification
Microbiology / endotoxin
Not shown

A public SPX batch report exists for Retatrutide 20mg with independent third-party results. It shows 99.531{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} purity and 21.99 mg content for batch SPX-RT20-001, but no separate chromatogram image or contaminant/microbiology panel was visible.

Dose & value

Vial size
20 mg
Vials per pack
1 (single vial)
Pack price
Out Of Stock (last in-stock price £50.00)
Price per vial
£50.00
Price per mg
£2.50
Compared with other suppliers
33% below the median (8 suppliers, same peptide)
Price last checked
21 Sep 2026

Retatrutide product details

Compound
Retatrutide
Supplier product name
Retatrutide (Analytical Reference Material) — 20mg
Supplier product code (SKU)
SPX-RETA-20MG
CAS number
2381089-83-2
Presentation
Lyophilised powder vial
Storage
Store the research material in accordance with the storage and handling information s
Supplier purity claim
Not disclosed

Listing details describe the supplier's own product page; they do not independently verify the contents of any vial. Check the current listing and the batch covered by any test report.

Supplier transparency

Supplier
SPX Labs
Legal company
SPX Labs
Companies House verified
Not found
UK address disclosed
Yes
Contact details
Yes
Shipping policy
Yes
Returns policy
Yes
Batch / testing process explained
Yes

View the full supplier profile →

Compare all Retatrutide suppliers →

What the record makes clear

  • An analytical report was located for this listing.
  • The report is for batch SPX-RT20-001 - confirm it matches the vial you receive.
  • Price per mg can be calculated from the labelled vial size.

What to keep in mind

  • Research use only. A score is not an endorsement, and does not mean a product is safe, sterile, effective or suitable for human or veterinary use.
  • One tested sample does not guarantee every vial is identical.

Explore the alternatives

Compare alternative

Retatrutide 20mgReta Research

Why this score?
Testing & analytical evidence
41/45
Value
17/25
Product identity
12/15
Supplier transparency
10/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Quantity
20 mg / vial
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Supplied as a lyophilised powder across six vial sizes, every batch reaches ≥99{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} purity confirmed by HPLC, with a Certificate of Analysis available on request. Independent lab paperwork for every research-peptide batch we currently hold in UK stock — each one confirming HPLC purity and mass-spectrometry identity, signed off by Janoshik Analytical.
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
EGB-0126-RT20
Batch-specific report
Recorded
Report date
2026-01-20
Evidence checked
2026-09-20
£4.00per mg
£80.00per pack
View AnalysisBuy Now
Product & testing details
Supplier
Reta Research
Vials per pack
1
Price per vial
£80.00
Listing last checked
2026-09-20 09:20:11
Evidence status
Verified independent evidence
Manufacturer statement
Supplied as a lyophilised powder across six vial sizes, every batch reaches ≥99{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} purity confirmed by HPLC, with a Certificate of Analysis available on request. Independent lab paperwork for every research-peptide batch we currently hold in UK stock — each one confirming HPLC purity and mass-spectrometry identity, signed off by Janoshik Analytical.
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
EGB-0126-RT20
Batch-specific report
Recorded
Report date
2026-01-20
Evidence checked
2026-09-20

Retatrutide 20mg

Reta Research
Why this score?
Testing & analytical evidence
41/45
Value
17/25
Product identity
12/15
Supplier transparency
10/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Supplied as a lyophilised powder across six vial sizes, every batch reaches ≥99{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} purity confirmed by HPLC, with a Certificate of Analysis available on request. Independent lab paperwork for every research-peptide batch we currently hold in UK stock — each one confirming HPLC purity and mass-spectrometry identity, signed off by Janoshik Analytical.
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
EGB-0126-RT20
Batch-specific report
Recorded
Report date
2026-01-20
Evidence checked
2026-09-20
£4.00per mg
£80.00per pack
View AnalysisBuy Now

Compare alternative

Retatrutide 20mgUK Peptides (ukpeptides.org)

Why this score?
Testing & analytical evidence
40/45
Value
15/25
Product identity
11/15
Supplier transparency
10/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Quantity
20 mg / vial
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Independent third-party laboratory report for batch UKP-RETA20-2512 of Retatrutide 20mg, issued by an accredited independent laboratory using HPLC-UV + Mass Spectrometry. Result: ≥98{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} (HPLC-UV).
Laboratory
Krause Analytical LLC
Certification body
Not recorded
Batch
UKP-RETA20-2512
Batch-specific report
Recorded
Report date
2025-12-25
Evidence checked
2026-09-20
£4.50per mg
£89.99per pack
View AnalysisBuy Now
Product & testing details
Supplier
UK Peptides (ukpeptides.org)
Vials per pack
1
Price per vial
£89.99
Listing last checked
2026-09-20 09:20:11
Evidence status
Verified independent evidence
Manufacturer statement
Independent third-party laboratory report for batch UKP-RETA20-2512 of Retatrutide 20mg, issued by an accredited independent laboratory using HPLC-UV + Mass Spectrometry. Result: ≥98{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} (HPLC-UV).
Laboratory
Krause Analytical LLC
Certification body
Not recorded
Batch
UKP-RETA20-2512
Batch-specific report
Recorded
Report date
2025-12-25
Evidence checked
2026-09-20

Retatrutide 20mg

UK Peptides (ukpeptides.org)
Why this score?
Testing & analytical evidence
40/45
Value
15/25
Product identity
11/15
Supplier transparency
10/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Independent third-party laboratory report for batch UKP-RETA20-2512 of Retatrutide 20mg, issued by an accredited independent laboratory using HPLC-UV + Mass Spectrometry. Result: ≥98{a48505b7a92a5d64fa947b6701e2877576ce853b374f7be6d82c62f5ee4ca6d5} (HPLC-UV).
Laboratory
Krause Analytical LLC
Certification body
Not recorded
Batch
UKP-RETA20-2512
Batch-specific report
Recorded
Report date
2025-12-25
Evidence checked
2026-09-20
£4.50per mg
£89.99per pack
View AnalysisBuy Now

Compare alternative

Retatrutide 10-mg / owsa-rt-10mgOwsa Labs

Why this score?
Testing & analytical evidence
38/45
Value
21/25
Product identity
11/15
Supplier transparency
3/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Quantity
10 mg / vial
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
"Certificate of analysis on every product"; "Third-party tested"; "Testing by Janoshik Analytical, covering peptide content and purity."
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
RT10/202602
Batch-specific report
Recorded
Report date
2026-02-16
Evidence checked
2026-09-21
£2.95per mg
£29.49per pack
View AnalysisBuy Now
Product & testing details
Supplier
Owsa Labs
Vials per pack
1
Price per vial
£29.49
Listing last checked
2026-09-21 17:26:44
Evidence status
Verified independent evidence
Manufacturer statement
"Certificate of analysis on every product"; "Third-party tested"; "Testing by Janoshik Analytical, covering peptide content and purity."
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
RT10/202602
Batch-specific report
Recorded
Report date
2026-02-16
Evidence checked
2026-09-21

Retatrutide 10-mg / owsa-rt-10mg

Owsa Labs
Why this score?
Testing & analytical evidence
38/45
Value
21/25
Product identity
11/15
Supplier transparency
3/10
Label & listing transparency
5/5
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
"Certificate of analysis on every product"; "Third-party tested"; "Testing by Janoshik Analytical, covering peptide content and purity."
Laboratory
Janoshik Analytical
Certification body
Not recorded
Batch
RT10/202602
Batch-specific report
Recorded
Report date
2026-02-16
Evidence checked
2026-09-21
£2.95per mg
£29.49per pack
View AnalysisBuy Now