What we hold

These are the laboratory certificates we hold, and the whole of what we hold. They cover 12 compounds out of roughly eighty in the catalogue. Where a compound is not on this page, we hold no certificate for it and make no claim about it.

Two of them — Follistatin and Kotho — are sold in our supplier’s own labelling, so the certificate covers the batch in the box. The rest are issued to the manufacturer who supplies our raw material, not to Optimal Lab, and they test that raw material rather than a finished vial. Those certificates report two things: how much compound was measured, and its purity by HPLC. They do not test identity, and we do not claim it.

Every report below opens in full. Nothing on this page is summarised from memory — if a certificate does not state something, this page does not state it either.

Follistatin (FLGR242)

1 certificateMatches the batch supplied

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
5 mg	93-6-46086	5.09 mg	99.74%	07 March 2026	MDx BioAnalytical Laboratory, Inc.Issued to BioLongevity Labs · report COA261001FLGR232 confirmed by mass identificationEndotoxin: Pass — threshold ≤0.05 EU/mL	View certificate

Kotho (alphaKlothoLR)

2 certificatesMatches the batch supplied

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10 mcg	94-6-46070	10.38 mcg	99.73%	20 Feb 2026	MDx BioAnalytical Laboratory, Inc.Issued to BioLongevity Labs · report COA260797a-KLOTHO-MAB confirmed by mass identificationEndotoxin: Pass — threshold ≤0.05 EU/mL	View certificate
10 mcg	KLOTHO	10.22 mcg	99.71%	21 Jan 2026	MDx BioAnalytical Laboratory, Inc.Issued to BioLongevity Labs · report COA260086a-Klotho confirmed by mass identificationEndotoxin: Pass — threshold ≤0.05 EU/mL	View certificate

Retatrutide

4 certificates

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10mg	PPA-YH-RT10-26070314	11.63 mg	99.313%	18 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202705	View certificate Verify with the lab
20mg	6	20.74 mg	99.522%	16 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173785	View certificate Verify with the lab
30mg	6	34.07 mg	99.617%	09 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 196880	View certificate Verify with the lab
60mg	6	60.92 mg	99.876%	16 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173789	View certificate Verify with the lab

Tirzepatide

4 certificates

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
30mg	6	32.71 mg	99.707%	16 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173777	View certificate Verify with the lab
40mg	6	43.60 mg	99.853%	16 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173781	View certificate Verify with the lab
60mg	PPA-YH-TR60-26070313	61.57 mg	99.691%	18 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202697	View certificate Verify with the lab
100mg	PPA-YH-TR100-26070312	97.62 mg	99.963%	18 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202701	View certificate Verify with the lab

Cagrilintide

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
5mg	PPA-YH-CGL5-26070521	5.03 mg	99.659%	16 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202733	View certificate Verify with the lab

Ipamorelin

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10mg	6	10.54 mg	99.736%	24 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 172611	View certificate Verify with the lab

Sermorelin

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10mg	PPA-YH-SMO10-26070417	9.79 mg	99.299%	16 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202717	View certificate Verify with the lab

CJC-1295 no DAC (mod GRF 1-29)

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10mg	PPA-YH-CND10-26070519	10.11 mg	99.893%	16 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202725	View certificate Verify with the lab

Epithalon

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10mg	6	10.52 mg	99.024%	15 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173793	View certificate Verify with the lab

DSIP

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
5mg	6	5.10 mg	99.105%	15 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173797	View certificate Verify with the lab

Melanotan-2

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
10mg	6	10.22 mg	99.257%	15 JUN 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 173805	View certificate Verify with the lab

AHK-Cu

1 certificate

Strength	Batch	Measured	Purity (HPLC)	Analysed	Laboratory	Report
100mg	PA-YH-AK100-26070416	53.40 mg (45.59 mg AHK content) [7.81 mg copper]	93.486%	16 JUL 2026	Janoshik Analytical s.r.o.Issued to YH Peptide · report 202713	View certificate Verify with the lab

For laboratory research use only · Not for human or veterinary use · No dosing guidance provided