Identity: LC-MS
Liquid chromatography-mass spectrometry weighs the molecule itself. The measured mass matches MK-677's signature, confirming the compound is what the label says, not a substitute, not a near-miss analog.
Lab results · Public record
Batch #1213681. Tested 16 MAR 2026. 99.635% pure. Read it yourself.
Tested by Janoshik Analytical, purity by HPLC, identity by LC-MS. The certificate below is the actual document, not a badge. The batch number is printed on your bottle so you can match the two yourself.
Batch
#1213681
Purity
99.635%
Tested
16 MAR 2026
Laboratory
Janoshik Analytical
Method
HPLC purity · LC-MS identity
Bottles left
312
The document
One page. Zero trust required.
Most vendors describe their testing. We publish it. This is the Janoshik certificate for the batch in every bottle currently shipping.
Verified ✓
Actual certificate, uneditedTask 1213681
Assay result, HPLC
0%
Verified purity
Purity, batch #1213681 · Janoshik Analytical
- Compound
- Ibutamoren MK-677
- Sample
- MK-677 · 60 g powder sample
- Method
- HPLC purity · LC-MS identity
- Tested
- 16 MAR 2026
- Laboratory
- Janoshik Analytical
- Bottles remaining in batch
- 312
- Identity confirmed by LC-MS, the molecule is MK-677, not a substitute
- Purity assayed by HPLC, the full certificate is on this page, not behind a form
- Batch number #1213681 is printed on every bottle, match it yourself
Batch lookup
Match your bottle to the record
Every bottle leaves the warehouse with its lot code printed on the base. Enter it to pull the batch's assay record, the same data as the certificate above.
Batch lookup
Assay archiveHow to read it
Three checks, plain English
A certificate of analysis is only useful if it can be read. Here is what each section of the document actually establishes.
Purity: HPLC
High-performance liquid chromatography separates the sample into its components and measures each one. The headline number on the certificate is the share of the sample that is MK-677 itself: 99.635%.
What 99.635% means
Of every gram of raw material, 996.35 mg is ibutamoren. The remaining 0.365% is inert synthesis residue, no other active compound was detected. Anything above 99% sits in pharmaceutical-grade territory.
Independent by design
We can't edit their results. That's the point.
Janoshik Analytical is an independent third-party laboratory serving the research-compound market worldwide. Primeletic pays a per-test fee and nothing else, no ownership ties, no retainer. Every certificate carries the lab's own task number, and Janoshik operates a public verification service, so this document can be checked against the lab's records directly, without going through us.
Task 1213681 · verifiable with the lab · new certificate published with every batch
Next step
Tested. Published. Guaranteed.
The purity is verified. The rest is covered by the 60-day empty-bottle guarantee: run the full trial-length protocol, and if you are not satisfied, the refund stands even on an empty bottle.
$0.58/day · 60-day guarantee · Orders before 2 PM ET ship same day