1. Look for a Specific PFAS Claim
Start with the simplest question:
Does the brand actually address PFAS?
A statement such as “PFAS-free” or “made without PFAS” directly addresses the concern.
By comparison, claims such as “natural,” “clean,” or “nontoxic” do not automatically tell you whether PFAS are present.
A specific claim gives you a starting point. The next step is to find out what supports it.
2. Check Whether the Finished Product Was Tested
One of the most useful questions is:
Was the finished product tested?
There is a difference between testing a raw material and testing the product that consumers actually purchase.
A finished product may contain multiple layers, fabrics, adhesives, elastic components, membranes, or other materials.
If a brand provides testing information, check what sample was actually submitted to the laboratory.
3. Look at the Laboratory
Independent laboratory testing can provide additional transparency.
When reviewing a test report, look for the name of the laboratory that performed the analysis.
You can also check whether the report identifies:
- The product
- The sample
- The testing date
- The report number
- The testing method
A specific report is generally more informative than a general statement that a company “tests its materials.”
4. Check What Was Tested
Not every PFAS test covers the same substances.
A report may test for a defined list of PFAS compounds, a broader group, or use a particular screening method.
This matters because the phrase “PFAS tested” does not tell you the full scope by itself.
Look for information about the actual substances or categories included in the test.
5. Check the Testing Method
A credible test report should identify the method used.
Different methods can be designed to answer different questions.
For example, fluorine screening can indicate the presence of fluorine, but it does not necessarily identify which PFAS compound is responsible.
Targeted PFAS analysis is different because it looks for specific substances within the testing scope.
Understanding the method helps you understand what the result actually tells you.
6. Understand “Not Detected”
You may see ND, or Not Detected, on a laboratory report.
ND generally means the substance was not detected above the applicable detection limit.
It does not necessarily mean the concentration is literally zero.
For example, a laboratory may have a detection limit of a particular concentration. If the result is below that laboratory's ability to detect it using the specified method, the result may be reported as ND.
This is why the detection limit matters.
7. Check the Detection Limit
A test result becomes more useful when you know the applicable detection limit.
Look for terms such as:
- MDL — Method Detection Limit
- LOD — Limit of Detection
These values help explain how sensitive the test was for the substance being measured.
When comparing two reports, do not look only at whether they say “ND.” Also look at the testing method and applicable detection limits.
8. Don't Confuse PFOA-Free With PFAS-Free
PFOA is a type of PFAS.
Therefore:
PFOA-free ≠ PFAS-free
A product can address one specific PFAS without addressing the broader PFAS family.
If your concern is PFAS as a group, look for a broader PFAS-related claim and supporting information.
9. Don't Assume a Certification Answers Everything
Certifications can be helpful when evaluating products.
However, each certification has its own requirements and testing scope.
Instead of asking:
“Does this product have a certification?”
also ask:
“What does that certification actually cover?”
If PFAS is your main concern, look for information specifically related to PFAS.
10. Don't Judge PFAS Status by Appearance
You cannot determine PFAS status simply by looking at a period product.
A waterproof layer does not automatically mean PFAS.
A synthetic fabric does not automatically mean PFAS.
A soft fabric does not automatically mean PFAS-free.
Product appearance and function are not substitutes for product-specific information.
What About Reusable vs. Disposable Period Products?
PFAS status should be considered separately from product format.
Reusable period underwear may appeal to consumers who prefer washable products.
Disposable period underwear may be more convenient for travel, overnight stays, quick changes, or situations where washing is difficult.
Neither format is automatically PFAS-free.
Instead of assuming one format is better, look at the specific product and the information the manufacturer provides.
A Simple PFAS-Free Shopping Checklist
Before buying a period product, ask:
- Does the brand make a specific PFAS-related claim?
- Was the finished product tested?
- Is the testing laboratory identified?
- What product or material was tested?
- Which PFAS substances or groups were included?
- Is the testing method identified?
- Are the results available?
- Are detection limits provided?
- Does the product provide the absorbency and leak protection I need?
- Is it comfortable for the way I plan to use it?
This checklist can help you compare products without relying entirely on marketing language.
What About MOLLIS?
MOLLIS Disposable Period Underwear provides product-specific PFAS testing information for consumers who want to understand the evidence behind its PFAS-related claim.
You can review the available testing information before deciding whether the product fits your needs.
The Bottom Line
Choosing PFAS-free period products is not simply about finding the right label.
The most useful approach is to look at the claim, the product, the testing scope, and the evidence behind the claim.
If a brand provides specific and transparent information, you have more context for making your own decision.
And beyond PFAS, remember to consider the factors that affect everyday use: absorbency, leak protection, fit, comfort, and convenience.