PEG MGF lab tests

29 certificates of analysis for PEG MGF are on file — 28 for single vials and 1 for blends and other forms — from 24 shops and 13 labs. The latest was tested on 2 Oct 2026.

These are certificates shops have chosen to publish, verified for authenticity before listing. Because shops decide which COAs to make public, the set reflects the batches they published rather than every production batch — a selection bias we state openly. What shop COAs show →

Tests on file

28 single vials · 1 blends & other forms

Median purity

99.59%

usual 98.84–99.83% · shop COAs

Measured vs label

102%

median · 0 under 90% · 3 over 120%

Latest test

2 Oct 2026

13 labs · 24 shops

Look up your vial's lot →PEG MGF prices →PEG MGF calculator Get a vial tested

What PEG MGF results look like

single vials only · 28 purity results · 26 measured-content results

Purity is tightly bunched: the middle 80% of results sit within 1.0 points. Measured content spreads across 25 points of the label.

HPLC purity

98.84–99.83%middle 80% of results

median 99.59%89% at 99% or higher0 under 98%

% HPLC purity

Measured content vs label

96–121%middle 80% of results

median 102%0 under 90%3 over 120%

% of the labelled amount

outside the usual rangeEndotoxin reported on 5 of 28 (18%)Confirmed on the lab's own portal: 6 (21%)Most tested size: 2 mg (14), then 5 mg (9) and 10 mg (2)

Results by lab

single vials · labs with the most PEG MGF tests

PEG MGF single-vial results by testing lab
Lab	Tests	Median purity	Median measured vs label	Endotoxin reported	Confirmed on lab portal
Janoshik Labs	5	99.22%	115%	0	1
Bioviridian	3	99.80%	106%	0	0
Ethos Analytics	3	99.00%	102%	1	0
MZ Biolabs	3	99.64%	100%	0	0
Vanguard Laboratory	3	99.65%	102%	0	1

Differences reflect the vials each lab received and how it reports — this is not a ranking of labs. Every lab with a PEG MGF test on file is linked under More on PEG MGF.

What the PEG MGF record shows

PEG MGF's record holds 29 certificates from 24 shops, tested by 13 labs between August 2024 and October 2026. 1 of them is a blend or other form and is left out of the figures below. Reported HPLC purity ran from 98.00% to 100.00% (median 99.59%). Measured content ran from 90% to 148% of the label (median 102%). 14 of the 28 vials were labelled 2 mg. 5 certificates include an endotoxin result, and 6 were confirmed on the lab's own portal.

Generated from the table below · updates with every new certificate

All PEG MGF tests

29 · newest first · blends tagged

29 records, most recent first.
Tested	Shop	Lab	Purity	Measured vs label	Endotoxin	Record
2 Oct 2026	Rogue Compounds	ILS Laboratories	99.84%	2.07 / 2 mg 103% of label	—	PEG2-260921-001✓
7 Aug 2026	Glow Aminos	Chromate	98.35%	1.91 / 2 mg 96% of label	Pass	GL-010184✓
6 Aug 2026	Humatide Peptides	ILS Laboratories	100.00%	2.1 / 2 mg 105% of label	—	H2PGM073126
15 Jul 2026	Biotech Peptides	MZ Biolabs	99.83%	5 / 5 mg 100% of label	—	3141064
6 Jul 2026	Modified Aminos	Ethos Analytics	99.00%	5.03 / 5 mg 101% of label	Pass	MA-MGF-100
10 May 2026	Disguised AlphaBlendPEG-MGF/Retatrutide	Chromate	99.22%	11.32 / 12 mg 94% of label	Pass	335XA
5 May 2026	Core Peptides	Vanguard Laboratory	99.50%	5 / 5 mg 100% of label	—	C73702✓
30 Apr 2026	BioEdge Research Labs	MDx BioAnalytical Laboratory	99.76%	5.18 / 5 mg 104% of label	Pass	260320PG53✓
12 Apr 2026	Pure Health Peptides	Ethos Analytics	99.00%	5.11 / 5 mg 102% of label	—	TUY-030926
12 Apr 2026	Pure Health Peptides	Ethos Analytics	99.00%	2.03 / 2 mg 101% of label	—	TUY-030926
27 Mar 2026	Modern Research Peptides	freedomdiagnosticstesting.com	99.80%	10.18 / 10 mg 102% of label	—	BCHK21P10✓
25 Mar 2026	Enhanced Peptides	Vanguard Laboratory	99.65%	2.22 / 2 mg 111% of label	—	FP26-3075
10 Mar 2026	Skye Peptides	Janoshik Labs	99.90%	6.35 / 5 mg 127% of label	—	PMG26-05-001
19 Feb 2026	BioLongevity Labs	MDx BioAnalytical Laboratory	99.72%	5.07 / 5 mg 101% of label	Pass	23-4-46069
16 Feb 2026	24Peptides	liquilabs	99.80%	1.94 / 2 mg 97% of label	Pass	GF122025101
16 Feb 2026	Soma ChemsClosed	freedomdiagnosticstesting.com	99.41%	9.81 / 10 mg 98% of label	—	Soma2602130217
13 Feb 2026	RUO.bio	Janoshik Labs	99.22%	1.48 / 1 mg 148% of label	—	View record →
10 Feb 2026	Blue Sky Peptide	MZ Biolabs	99.64%	not reported	—	4PUQ0226
10 Feb 2026	Blue Sky Peptide	MZ Biolabs	98.48%	not reported	—	1SWMF0126
6 Feb 2026	Loti Labs	SR Bio Labs	99.22%	2.73 / 2 mg 137% of label	—	LOT-MGF-00002
12 Jan 2026	Peptide Hubs	Janoshik Labs	99.20%	5.75 / 5 mg 115% of label	—	GAPEG12✓
7 Jan 2026	Ion Peptide	Bioviridian	99.80%	2.13 / 2 mg 107% of label	—	PMGF-010226
16 Dec 2025	Ion Peptide	Bioviridian	99.80%	2.11 / 2 mg 106% of label	—	PMGF-121325
16 Dec 2025	Ion Peptide	Bioviridian	99.80%	1.88 / 2 mg 94% of label	—	PMGF-121325
22 Sep 2025	Amino USA	BioRegen	99.36%	2.31 / 2 mg 116% of label	—	25PEGMGF2-0001
28 Aug 2025	Peptidology	Vanguard Laboratory	99.80%	5.08 / 5 mg 102% of label	—	1363
15 Aug 2025	Strate Labs	Janoshik Labs	99.00%	1.8 / 2 mg 90% of label	—	View record →
28 Feb 2025	Biolabshop	Analiza Białek	98.00%	4.05 / 4 mg 101% of label	—	100007022
29 Aug 2024	Skye Peptides	Janoshik Labs	99.54%	8.24 / 8 mg 103% of label	—	PE24-08-001

Measured amount in amber when it is under 90% or over 130% of the label; Check label when it is under 80% or over 150%. Records without a lot number link as View →. Blend and other-form rows keep their place and page; they are tagged and left out of the figures above, because a blend certificate reports one purity and one amount for the whole vial.

Seven checks for any PEG MGF certificate

Batch-matched and independent. The certificate names the lot in your hands and comes from a lab the vendor neither owns nor pays.
Purity against the range. Read the figure against what other certificates for this compound report. How to read HPLC and mass-spec results
Mass-spec identity. Only mass spectrometry shows which molecule is in the vial.
Net content, measured. Purity and quantity are separate questions. Why 10 mg isn't 10 mg
Endotoxin on the batch. A missing line means not tested, not passed. Endotoxin testing and LAL interpretation
A lab you can check. Named on the certificate, with a way to verify it. Testing labs we track · Red flags in a certificate of analysis
What no test shows. A clean certificate says nothing about efficacy, dosing or long-term safety.

Want a vial tested yourself? How to send a peptide for independent HPLC testing →

More on PEG MGF

PEG MGF — compound profilewhat it is, shops, purity PEG MGF prices$/mg across lab-tested shops PEG MGF calculatorreconstitution and units COA benchmarkswhat shop COAs show and leave out Get a peptide testedlabs, prices, what to order Check your viallook up a lot number

Labs with PEG MGF tests on file (13): ILS Laboratories, Chromate, MZ Biolabs, Ethos Analytics, Vanguard Laboratory, MDx BioAnalytical Laboratory, freedomdiagnosticstesting.com, Janoshik Labs, liquilabs, SR Bio Labs, Bioviridian, BioRegen, Analiza Białek