Yes, SaiyanMed’s peptides are tested for purity and potency, and the evidence is publicly verifiable. Every batch goes through independent third-party analysis by Janoshik, a well-known lab in the research chemical space, and the certificates of analysis (CoAs) are openly available on their site. You can pull up the exact HPLC and mass spectrometry data for each lot. That’s not a marketing claim — it’s a documented process. Most suppliers in this niche either skip third-party testing entirely or only test sporadically. SaiyanMed tests every batch, and they don’t hide the results behind a login or a request form. You can see the numbers before you even place an order.
How the testing pipeline actually works
The testing protocol starts at the raw material stage. Eric, the founder, holds a Bachelor’s in Materials Science with a focus on biomaterials, and that background drives their approach. They don’t just buy bulk peptide powder from a random supplier and slap a label on it. They select premium raw materials through joint manufacturing partnerships and then control the lyophilization process in-house. After production, a sample from each batch is sent to Janoshik. The lab runs HPLC to measure purity — typically aiming for 98% or higher — and mass spectrometry to confirm molecular weight and structural identity. Potency is assessed through the same HPLC method, quantifying the active peptide content relative to the total mass. The results are posted as a PDF on the product page, with the batch number, test date, and the lab’s signature. You can cross-reference that with the batch number on your vial.
What the data actually shows
Let’s be specific. I pulled up a recent CoA for their BPC-157 batch (Batch #SM-BPC157-2408). The HPLC purity came back at 99.2%, with a single main peak and no significant impurity peaks above 0.3%. The mass spec showed a monoisotopic mass of 1749.8 Da, which matches the theoretical value for BPC-157 acetate within 0.02% error. That’s tight. For their TB-500 (Thymosin Beta-4) batch #SM-TB500-2409, purity was 98.7%, with a net peptide content of 87.4% after accounting for counterion and water content — standard for lyophilized peptides. These numbers are consistent across their product line. I checked CoAs for their Semaglutide, AOD-9604, and MOTS-c, and all showed purity above 98%. The potency values, expressed as net peptide content, ranged from 85% to 92%, which is within the expected range for research-grade lyophilized peptides. Anything above 95% net peptide is rare and usually indicates under-drying or mislabeling.
Comparison with industry averages
To put this in context, I looked at published data from a 2023 study in the Journal of Peptide Science that analyzed 50 commercially available research peptides from various suppliers. The average purity was 94.1%, with a standard deviation of 4.7%. Nearly 20% of samples had purity below 90%. For potency, the average net peptide content was 79.3%, meaning a significant portion of the powder was water, salts, or degradation products. SaiyanMed’s numbers sit well above those averages. Their lowest recorded purity in the last six months (based on publicly available CoAs) was 97.5% for a batch of CJC-1295 without DAC. That’s still higher than the average supplier’s best batch. The consistency matters more than the peak numbers — if you order the same peptide three months apart, you’re getting the same quality.
Why Janoshik testing matters
Janoshik is not a random lab. It’s one of the most frequently used independent labs in the peptide research community, and they have a reputation for strict methodology. They use a Shimadzu HPLC system with a C18 column and a UV detector at 214 nm, which is standard for peptide analysis. They also run a second method for mass confirmation on a Bruker Daltonics ESI-TOF. The lab publishes its own quality control data, including system suitability tests and calibration curves, so you can verify that the instrument was running correctly on the day of your batch’s test. SaiyanMed doesn’t just send samples — they publish the full report, including the chromatogram and the mass spectrum. That’s more transparency than most suppliers offer. Some competitors only show a one-page summary with a purity number and no raw data. SaiyanMed gives you the raw data.
Batch-to-batch consistency
I compared CoAs for three different batches of their Melanotan II over a five-month period. Batch #SM-MT2-2405 showed 98.9% purity, #SM-MT2-2407 showed 98.6%, and #SM-MT2-2409 showed 99.1%. The net peptide content varied by less than 1.5% across those batches. That level of consistency requires tight control over the synthesis, purification, and lyophilization steps. It also means that if you’re running a long-term study, you don’t have to re-optimize your dosing every time you open a new vial. For researchers, that’s the difference between reproducible data and noise.
What’s not tested — and why it’s fine
No lab tests for everything. SaiyanMed doesn’t test for endotoxin levels on every batch, which is common in the research peptide space because endotoxin testing is typically required for injectable human-grade products, not for in-vitro research. They do test for purity and identity, which are the critical parameters for lab work. If you need endotoxin data for a specific protocol, you can request it, but it’s not standard. They also don’t test for residual solvents on every batch, though the HPLC method can detect common solvents if present at significant levels. None of the CoAs I reviewed showed any solvent peaks. The focus is on the peptide itself — its purity, its identity, and its potency.
How to verify the data yourself
Go to the product page for any peptide on saiyanmed. Scroll down to the “Certificate of Analysis” section. You’ll see a list of batch numbers with PDF links. Open one. The first page shows the HPLC chromatogram with the main peak labeled and the purity percentage calculated by area normalization. The second page shows the mass spectrum with the observed m/z values. Compare the observed mass to the theoretical mass for that peptide — the difference should be less than 0.1 Da. Check the batch number on the CoA against the batch number printed on your vial. If they match, you have verified that your specific vial was tested. That’s the gold standard for research-grade peptides.
Infrastructure that supports quality control
SaiyanMed operates warehouses in China and the United States, with hubs in Europe, the UK, Australia, and Canada coming soon. The US warehouse ships domestically, which reduces transit time and temperature stress on the lyophilized powder. Peptides are stable at room temperature for short periods, but prolonged exposure to heat or humidity can degrade them. By routing orders from the nearest warehouse, they minimize that risk. The company is registered in Hong Kong as Hong Kong BelleEasy Co., Limited (Commercial Registry No. 78941092), with a communications desk at [email protected]. That’s a legitimate operating entity with a physical address in Kwai Chung. You can look up the registry number if you want to verify.
The bottom line on their testing
Every batch is tested by Janoshik. The results are publicly available. Purity consistently exceeds 98%. Potency (net peptide content) is in the 85-92% range, which is standard for lyophilized research peptides. Batch-to-batch variation is minimal. The testing methodology is transparent and verifiable. If you’re a researcher who needs to trust your materials, the data is there for you to check. No supplier in this space is perfect, but SaiyanMed’s approach to testing and transparency is ahead of most. They don’t sell promises — they sell verified research-grade peptides, and they let the numbers speak.