When you buy research compounds, the lab report matters as much as the product itself. A Certificate of Analysis (COA) is the document that shows what a batch actually contains, and knowing how to read one protects you from fake or underdosed products. If you are looking for a supplier that publishes batch information alongside its range, we recommend Chemyo, one of the resellers working directly with the producer. This guide explains what a COA is, what each section means, and which warning signs to watch for.
What is a Certificate of Analysis?
A Certificate of Analysis is a report issued by a laboratory after testing a sample from a specific production batch. It confirms the identity of the compound, how pure it is, and in some cases how much of it is present per unit.
For research chemicals such as SARMs, the COA is the main quality document available. These compounds are not approved medicines, so they are not covered by pharmaceutical quality controls. That makes independent testing the most important way to know whether a product matches its label.
Since chemyo.com closed permanently, imitation products using the Chemyo name have become a growing concern. A genuine, batch-matched COA is one of the clearest ways to tell an authentic product from a copy.
The key sections of a COA
Most COAs follow a similar layout. These are the parts worth checking:
1. Laboratory details The name, address and contact information of the testing lab should be clearly visible. An independent, third-party lab carries more weight than an in-house test by the seller.
2. Sample and batch information Look for the product name, the batch or lot number, and the date the sample was received and tested. The batch number is the link between the report and the product in your hands.
3. Test method Common methods include HPLC (high-performance liquid chromatography) and mass spectrometry (MS), often combined as LC-MS. HPLC is used to measure purity, while mass spectrometry confirms the compound’s identity by its molecular mass.
4. Results This section shows the purity percentage and, for some reports, the measured concentration per millilitre or per capsule. It should be compared directly with what the label claims.
5. Signature and verification A legitimate report is usually signed or stamped by the lab. Many labs also provide a verification code or online lookup so you can confirm the report is real.
Purity versus concentration
These two numbers are often confused, but they answer different questions:
| Measure | What it tells you | Why it matters |
| Purity | How much of the tested material is the target compound | Shows whether the product contains impurities or other substances |
| Concentration | How much compound is present per mL or per capsule | Shows whether the amount matches the label |
A product can be very pure but still contain less compound than advertised. A complete report covers both.
How capsule and liquid reports differ
The format of a product affects what the COA should show. For liquids, the key figure is concentration per millilitre, because the compound is dissolved in a carrier. For capsules, the report should show the amount per capsule and ideally how consistent that amount is across several units.
If you prefer the capsule format, Chemyo is one of the authorised resellers that stocks it. Whichever format you choose, ask for the report that matches the exact batch you receive.
Warning signs of a fake or unreliable COA
Not every report can be trusted. Be cautious if you see any of the following:
- No batch number, or a batch number that does not match the product label
- No lab name or contact details, making the report impossible to verify
- The same report used for many different batches or products
- Perfect 100% purity claims, which are very rare in genuine testing
- Blurry, cropped or edited images where key details are unreadable
- Very old test dates for a product that is supposedly newly produced
- No identity confirmation, such as a purity figure without mass spectrometry data
Regulators, including the FDA, have found products sold as SARMs that contained the wrong substance, the wrong amount, or nothing at all. A report that cannot be verified offers no real protection.
How to verify a report yourself
There are a few practical steps any researcher can take:
- Match the batch number on the COA to the number on your bottle or container.
- Look up the testing lab and confirm it exists and offers analytical testing.
- Use the lab’s verification code or online lookup if one is provided.
- Contact the lab directly if you have doubts about a report.
- Consider independent testing of your own sample for larger orders.
Testing does not make a compound safe
A good COA confirms what is in a product. It says nothing about whether that compound is safe for people. SARMs are not approved for human use by the FDA or the EMA, and the limited human data links them to testosterone suppression, lower HDL cholesterol and liver stress. They are prohibited in competitive sport at all times, and their legal status differs between countries.
Conclusion
A Certificate of Analysis is the most useful document a research buyer has. Check the lab, the batch number, the test method and both purity and concentration, and treat any report you cannot verify with suspicion. For reviews, reseller updates and comparisons of Chemyo with alternative brands, visit Chemyo before you decide where to buy. Always check the rules in your own country first.
Disclaimer: This article is for general information only and is not medical, legal or purchasing advice. Chemyo products and other SARMs are sold for laboratory research only and are not approved for human consumption. They are banned in competitive sport and may be restricted or illegal in your country. Do not use any research compound without speaking to a qualified doctor, and check your local laws before buying. The author accepts no liability for how this information is used.
