Lab report (Certificate of Analysis, COA)

PGL-GI1 · 65.29 mg

Batch 1672 · tested April 10, 2026 (163 days ago) · released May 25, 2026

All tests passed

Batch: #1672 14 tests
Mass: 65.29 mg
Purity: >99.80%
Issuing lab accreditation: Vanguard · ISO 17025:2017 / A2LA #6377.01.01

3 units tested for purity, each printed >99.80% · net peptide content 63.55 / 64.06 / 64.15 mg

Conformity: Units agree — every reported unit passed on all 10 test rows · purity spread at most 0.20 pt within the house limit · content spread 0.9% within the house limit · QA approval corroborates: Vanguard Laboratory, Tori Johnson, Operations Manager, 2026-04-10

Vanguard · issuing labEagle Analytical · sterility

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This certificate is also hosted by Vanguard Laboratory — the issuing lab — on its own verification site.

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Laboratory ID V260325-11 001

Reports for this lot

Vanguard Laboratory this report · tested April 10, 2026 · 10 results · QA approvalVanguard · issuing labEagle Analytical · sterilityAll tests passed
Vanguard Laboratory second report · tested March 31, 2026 · 6 results · QA approvalVanguard · issuing labEagle Analytical · sterilityAll tests passed

Test by test

10 results on the report · 3 rows computed from the per-unit values · 2 labs · each test used up to 5 vials from this lot (rows are not added together) · every row names the chapter or house rule it follows

✓PurityWithin limits

>99.80, >99.80, >99.80 · 3 units · USP <621> (procedural chapter)

✓Purity consistency between unitsWithin house limit

3 units, each above 99.80% (the lab's reporting bound) · units differ by at most 0.20 pt · house limit · caution past 0.50 pt, outside past 1.00 pt · per-unit USP <621> results

✓Net peptide content (assay)Within limits

avg 63.92 mg · 3 units · USP <621> (procedural chapter)

✓Content consistency between unitsWithin house limit

3 units: 63.55 / 64.06 / 64.15 mg · spread 0.60 mg, 0.9% of the mean · house check · caution past 5%, outside past 10% · USP <905> is the compendial reference for between-unit uniformity (10 units; not claimable on 3)

✓Heavy metalsWithin limits

all non-detect · 1 unit · dose-scaled limits derived from USP <232> (limits chapter)

✓Residual solventsWithin limits

all non-detect · 1 unit · USP <467> (procedural chapter)

✓Trifluoroacetic acidWithin limits

all non-detect · 1 unit · house limit · ion chromatography, the lab's method; no compendial chapter for the method run · limit <0.10% (the lab's)

✓EndotoxinsPass

2 of 2 pass · 2 units · USP <85> (procedural chapter)

✓Container closurePass

2 of 2 pass · 2 units · USP <1207> (informational chapter (1000-series))

✓SolubilityPass

2 of 2 pass · 2 units · house check · no compendial chapter

✓SterilityPass

5 of 5 pass · 5 units · USP <71> (procedural chapter)

✓SterilityPass

1 of 1 pass · 1 unit · USP <71> (reference) · a rapid viability test used as an alternative to the USP <71> growth test; USP <1223> is the validation framework (informational chapter) · at Eagle Analytical

✓ConformityUnits agree

every reported unit passed on all 10 test rows · purity spread at most 0.20 pt within the house limit · content spread 0.9% within the house limit · QA approval corroborates: Vanguard Laboratory, Tori Johnson, Operations Manager, 2026-04-10 · house check · agreement across all tests, unit to unit; QA approval corroborates

A chapter number names the method or limit a result follows; it does not describe the product. Chapters below 1000 are procedures or limits; 1000-series chapters are informational. USP <905> is the compendial test for between-unit uniformity: it assays 10 units, so a 3-unit certificate cannot yield its acceptance value — the content row is a house check with <905> named as the reference only.

Certificate PDF — Lot 1672

Signed third-party lab report.

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