How to Buy Peptides Safely: 10 Questions to Ask Any Seller
The peptide market is full of products whose contents don't match the label. These ten questions separate sellers you can check from sellers you can't.
Key takeaways
- Ask exactly what the ingredient is, and ask for proof of identity, not just purity.
- A certificate of analysis (COA) should name the lab, the lot and what was tested.
- Milligrams on a label are the amount loaded, not the amount your body receives.
- "Research use only" is a warning sign, not a quality badge.
- No checklist makes an experimental peptide risk-free. Involve a clinician.
Peptides are sold everywhere: clinics, websites, social media and "research chemical" shops. Some sellers are careful. Many aren't, and the products can be mislabeled, contaminated or not what they claim. These questions work for any seller, injectable or needle-free, including us.
The 10 questions
1. What exactly is the ingredient? Ask for the exact molecule, not a nickname. "TB-500," for example, can mean a short fragment or the full-length protein.
2. How was its identity confirmed? Look for mass spectrometry. Purity alone doesn't prove you're getting the right molecule.
3. Who tested it? A COA should name an independent lab, the analyst or signer, the date and the method.
4. Does the COA match what you're buying? Ask how the tested lot connects to the product lot you'll receive.
5. Was the raw ingredient tested, or the finished product? Both are useful; they're different things.
6. What moves the ingredient into your body? For patches: passive, microneedle or iontophoresis? See Real Patch or Sticker?
7. Are milligrams presented as a delivered dose? Without human blood-level data, they're the amount loaded, nothing more.
8. Is the FDA language precise? "FDA registered" isn't "FDA approved." See Are Peptide Patches FDA Approved?
9. Does a clinician review orders? Understand what that review covers and what it doesn't.
10. What does the seller say it doesn't know? A credible seller names its evidence gaps.
How to read a certificate of analysis
| What to look for | Why it matters |
|---|---|
| Lab name and contact details | You can verify the lab exists and is independent |
| Lot number and analysis date | Ties the result to a specific batch |
| Method (e.g., HPLC for purity, mass spectrometry for identity) | Purity without identity can hide the wrong molecule |
| Expected vs measured molecular mass | Confirms the molecule is what the label says |
| Purity percentage and chromatogram | Shows how much of the sample is the target compound |
| Verification code or QR, if offered | Lets you confirm the report wasn't altered |
A COA tells you about identity and purity for a tested lot. It doesn't tell you the dose your body receives, and it isn't a safety or effectiveness study.
Red flags
- "For research use only" or "not for human consumption," paired with dosing advice. USADA warns athletes never to use products marketed this way [1].
- No COA, or a COA with no lab name, lot number or method.
- Claims that a patch equals injections or IVs, or that the label amount is fully absorbed.
- "FDA approved" used for peptides that aren't approved drugs.
- Disease-treatment promises.
- No real company: no address, no way to reach a person, no clinician you can look up.
- No mention of anti-doping status for BPC-157, TB-500 or MOTS-c [2].
How LavION answers these
- Identity and purity: ingredient lots are tested by MZ Biolabs, an independent lab, by HPLC and mass spectrometry.
- Delivery: LavION uses the ActivaPatch IontoGo 12.0 iontophoresis device, which applies a low electrical current to help move charged molecules across the skin during a wear period of up to 12 hours. LavION is needle-free and does not use microneedles. Ingredient amounts describe what is loaded into the formula, not measured delivery into the body.
- Clinician review: A Good Faith Exam with a licensed provider is required before your first purchase.
- What we don't know: how much of each ingredient reaches the bloodstream. LavION hasn't published human pharmacokinetic data, and we don't claim equivalence to injections.
For the full picture, read Is LavION Legit?
References
- 1.U.S. Anti-Doping Agency. BPC-157: experimental peptide prohibited. usada.org
- 2.World Anti-Doping Agency. World Anti-Doping Code International Standard: Prohibited List 2026 (in force January 1, 2026). wada-ama.org
Frequently asked questions
Does a COA prove a peptide is safe?
No. It shows identity and purity for a tested lot. It doesn't establish safety, effectiveness or the dose your body receives.
Does 99% purity mean 99% of the label amount reaches my body?
No. Purity describes the sample. How much reaches your body depends on the route and has to be measured separately.
Is "research use only" a sign of quality?
No. It's a red flag, especially when it's paired with dosing advice.
What should a good COA include?
The lab's name, the lot number, the analysis date, the methods used (such as HPLC and mass spectrometry), expected versus measured mass, and a purity result.
Should a seller promise healing or treatment?
No. Peptides sold for wellness aren't approved to treat disease, and treatment claims are a warning sign.
Are peptides safe for tested athletes?
BPC-157, TB-500 and MOTS-c are prohibited at all times. Check every ingredient in Global DRO before use.
Keep reading
This article offers general wellness education and does not replace medical advice. Statements about LavION products have not been evaluated by the FDA, and these products are not intended to diagnose, treat, cure, or prevent disease. Peptide orders include a clinician review before fulfillment. If you are pregnant, nursing, managing a condition, or taking medication, speak with your clinician. See our medical disclaimer.