Monthly Archives: September 2026
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September 18, 2026
Every product on our Independent Analysis page has one or more Certificates of Analysis (CoAs) from MZ Biolabs, an independent analytical laboratory in Tucson, Arizona. We publish them so you don't have to take our word for what's in the vial or tablet.
A CoA is only useful if you know how to read it. This guide goes through one of our reports section by section, explains what each number means and shows you how to check that a CoA, ours or anyone else's, is genuine.
We'll use our Ostarine (MK-2866) report, analysed March 2023, as the worked example. Open it alongside this post and follow along.
All information is for educational and research purposes only.
Open the Ostarine CoA alongside this guideClose the Ostarine CoA
Open in a new tab ↗1. The Header: Who Tested It and Who For
At the top of every report you'll see:
- The laboratory: MZ Biolabs, with its full address and contact details.
- The client: Peak
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September 01, 2026
MK-677 has appeared in our SARM Showdowns twice already, against RAD-140 and against Cardarine. Each time we pointed out that it isn't actually a SARM. It is a growth hormone secretagogue: a compound that prompts the body to release more of its own growth hormone (GH).
It isn't the only one. Two peptides, Ipamorelin and CJC-1295, act on the same system but in different ways. This three-way Showdown compares the oral option against the two peptide options.
All information is for educational and research purposes only.
First, How Growth Hormone Release Works
The pituitary gland releases growth hormone in pulses, mostly during deep sleep. Three signals control it:
- GHRH (growth hormone-releasing hormone) from the hypothalamus tells the pituitary to release GH.
- Ghrelin, the "hunger hormone", acts on a separate receptor (GHS-R1a)
