Research peptides and SARMs are tested with analytical methods such as HPLC for purity and mass spectrometry for identity. At Explicit SARMs, every batch is manufactured in the US and tested at three stages: our manufacturer tests it when the raw material arrives and again after processing, then Accumark, a third-party lab, tests it independently on our behalf when we receive the finished batch. The certificate of analysis for your lot is available on request.
By the Explicit SARMs Team. Updated October 23, 2026.
Why does testing matter for research compounds?
Research results are only as reliable as the material that goes into them. If a compound is mislabeled, underfilled or contaminated with related substances, a study can produce misleading data. Testing answers two questions that matter for any lab: is this the right compound, and how much of the sample is that compound?
What are the three testing stages?
Stage 1: raw material on arrival
Before any processing starts, the incoming raw ingredient is checked for identity and purity. This catches problems at the source, before a bad input turns into a bad batch. This test is run by our manufacturer.
Stage 2: after processing
For capsules and liquids, this test happens after the finished product is made, which confirms the compound survived processing and is present as labeled. For peptides, it happens after lyophilization, the freeze-drying step that turns the peptide into the powder in the vial. This test is also run by our manufacturer.
Stage 3: on receipt of the finished batch
When the finished batch reaches us, it is tested independently by Accumark, a third-party lab, on our behalf. This is the batch that ships to you, so the final test is tied to the same lot number printed on your label.
Which analytical methods are used?
- HPLC (high-performance liquid chromatography) separates the sample and measures purity as a percentage.
- Mass spectrometry (MS or LC-MS) measures molecular mass to confirm identity.
- Content or assay testing checks that the amount per capsule, vial or milliliter matches the label.
Who is Accumark?
Accumark is the independent, third-party analytical lab that runs the final test on every batch for us, after two tests by our manufacturer. Using an outside lab means the results do not come from the seller grading its own work.
Where are Explicit SARMs products made?
Our products are made by domestic manufacturing partners in the United States. We do not relabel anonymous bulk powder, and each batch keeps its lot number from manufacture through shipping.
How do I get the COA for my order?
Send us the product name and the lot number on your label through our contact page or by email at [email protected], and we will send the COA for that lot. If you are new to reading these reports, see how to read a COA.
Are tested products approved for human use?
No. Testing confirms identity and purity for research. It does not make any compound an approved drug or suitable for human consumption.
Which products does this cover?
The same process applies across our catalog, from SARM capsules such as Ostarine MK-2866 to research peptides such as BPC-157 and research liquids.
What does a purity result actually tell you?
A purity result from HPLC is the share of the detected material that is the target compound. A result of 99% means that about 1% of the signal came from other substances, such as synthesis by-products or closely related sequences. Purity does not on its own confirm identity, which is why we pair it with mass spectrometry.
Why test the same batch three times?
Each stage answers a different question. The first confirms the starting material is right. The second confirms processing did not change or degrade it. The third confirms the batch that ships is the batch that was tested. Skipping any stage leaves a gap where problems can go unnoticed.
How is testing different for blends?
For a blend such as KLOW or SX3, the identity test has to confirm every component, not just one. The COA should list each compound separately so you can see that all of them are present.
What does the lot number do?
The lot number links the physical product to its test results. It is printed on the label and appears on the COA. When you request a COA, quoting the lot number ensures you receive the report for your exact batch rather than a different run.
For laboratory research use only. Not for human consumption. Sold by Explicit SARMs solely as reference material for in-vitro and laboratory research by qualified professionals. Not evaluated by the FDA and not intended to diagnose, treat, cure or prevent any disease.