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Certificate of Analysis Supplement Basics: What a CoA Proves
A certificate of analysis supplement document, or CoA, is a lab report for one batch. It lists what was tested, the method, the result and the lab that signed it. A lot number alone is not a CoA. Melonex shows seller references for its lot and CoA, but no lab report is published.
Written by the Melonexcare editorsUpdated · 5 min read
No. 01CoA basics
What is a certificate of analysis for a supplement?
A certificate of analysis for a supplement is a signed lab report that shows what one batch contained on the day it was tested.
Think of it as a receipt from a lab. It does not describe the brand. It describes one lot, a run of bottles made together.
A usable report names the lab, the sample, the date and the method. It lists each test with a result and a limit, such as identity of the ingredient or contaminants.
The company that made the batch may hold the report. Some share it on request. Some post it online beside the lot number. Many do neither.
No. 02Proof and limits
What does a CoA prove, and what can it not prove?
A CoA can prove what a tested sample contained, and it cannot prove that the product works or that every bottle matches.
That gap matters, so here are both sides in one view.
What a real CoA can show
- Which ingredient was in the sample
- Whether tested amounts matched the label for that lot
- Whether named contaminants were below a limit
- Which lab did the work, and when
What it cannot show
- That the capsule helps your health
- That other lots are the same
- That the report belongs to your bottle
- That the lab was independent
Health claims are a separate matter. They need competent and reliable scientific evidence that fits the product, and a purity report is not that evidence (FTC, Health products guidance).
No. 03On Melonex
Does Melonex have a certificate of analysis?
We found no published lab report for Melonex; the seller's materials lists a lot reference and a CoA reference, and both are only references.
The seller gives a lot reference, M-26/ME-2181, and a CoA reference, M-2181-26-ME. A reference is a code written down. A CoA is a document you can open.
We could not open one, so we do not call either number proof. The label names no lab. It does carry a distributor and a line saying the product was manufactured in an FDA registered facility, which is not approval (FDA, Is it really FDA approved?).
| Item | Seller reference | Lab report |
|---|---|---|
| Names a lab | No | Yes |
| Shows test results | No | Yes |
| Can be opened | Code only | Document |
| Melonex, October 19, 2026 | Quoted in the seller's materials | Not published |
Call +1 (855) 889-3137 with your lot number and ask for the report that matches it. Write down who answers and when. If a report exists, a name and a date should be on it.
No. 04Reading one
How do you read a certificate of analysis?
You read a CoA by checking the lab, the batch, the date and then each result against its limit, in that order.
Check the lab
Find a name, an address and a signature. A logo alone is not enough.
Match the lot
The lot number on the report must equal the one on your bottle.
Read the dates
The test date should fall before the expiry date, and make sense for the batch.
Compare result and limit
Each line needs a result and a limit. A result with no limit tells you little.
Our batch check page shows where to find the lot number on a Melonex bottle, and the testing and quality page lists what is and is not on file.
No. 05Badges again
Is a badge the same as a certificate of analysis?
No. A badge is a picture and a certificate of analysis is a document, and the five Melonex badges are pictures.
A badge can sit on a page with no test behind it. The seals below come from the seller's own image set.
Matches the label line about an FDA registered facility. Registration is not approval, and FDA does not endorse products.
A badge supplied by the seller. It names no auditor and no certificate is on file.
A badge supplied by the seller. The label itself makes no GMO statement, and no test is published.
In line with the label, which says made in the USA with globally sourced ingredients. The countries are not named.
The seller lists a 60-day money-back guarantee with a 20% restocking fee. Confirm the live policy.
Each badge comes from the seller’s image set. Badges are the seller's claims, not certificates, and none of them names a certifier, lab or audit. FDA does not approve supplements before they are sold (FDA, Is it really FDA approved?), and health claims in ads need real evidence (FTC, Health products guidance).
No. 06If you decide
What should you do before buying a supplement without a CoA?
Ask for the report, weigh it in the legit check, read the refund terms and talk to your pharmacist, and buy only if the answers sit well with you.
Refunds here need sealed bottles and carry a 20% restocking fee, so ask first. Keep taking prescribed medicine, and tell your doctor what you add. The packs are as listed in the seller's materials; confirm at checkout.
Prices as listed on the seller’s order page, October 19, 2026; confirm at checkout. The 2-bottle kit is $158 plus $9.99 shipping. Check your medicines with your doctor first. 60-day money-back guarantee (seller’s terms).
Melonex is a dietary supplement, not a treatment. Ask your doctor or pharmacist first if you take a nitrate for chest pain, an erectile-dysfunction drug such as sildenafil, any blood pressure medicine, a potassium-sparing diuretic, a blood thinner or a diabetes medicine, or if you have had a heart attack. Arginine and citrulline can push blood pressure down further. Keep taking prescribed medicine. See side effects and interactions.
No. 07FAQ
Melonex questions people ask
Is a lot number the same as a certificate of analysis?
No. A lot number only labels a batch. A certificate of analysis is a lab report for that batch. You can have the first without the second, so ask the seller for the report that matches your lot.
How can I get a CoA for a supplement I already own?
Find the lot number on the bottle, then contact the company with it and ask for the matching report. A reply should name the lab and the date. If they send only a code, ask again.
Does a CoA mean a supplement is safe for me?
No. It speaks to one batch, not to your health, medicines or conditions. Interactions and your own history need a doctor or pharmacist, who can read the label with you.
No. 08Who wrote this
Written and reviewed by
Pages built from the bottle label, the seller’s order page and linked NIH, FDA, CDC, AHA, FTC and peer-reviewed sources.
Last updated . Learn about our editorial standards and how we check reviews. This website is run by Melonexcare, which describes itself as an authorized American Melonex outlet. It is not the manufacturer or the label’s distributor. Buying through our order links earns us money.
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More about Melonex
Authorized American Melonex outlet
Ready to start Melonex?
Bring the label to your doctor or pharmacist first, then choose a pack. Six bottles cost the least per bottle, and the seller lists a 60-day money-back guarantee on every kit.
- Secure checkout
- 60-day money-back
- Ships from the U.S.