Karat Review, Is Karat Non-Toxic?
Across 8 graded products, Karat averages Good (51/100). On disclosure, the brand says nothing publicly about PFAS. 4 of its products grade Good or better. Grades are model-based estimates, not lab results.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Worth buying from Karat Good or better, best-graded first
Karat
Earth Eco-Friendly PLA Round Deli Container
PLA (polylactic acid) bioplastic
Microplastics
PLA can release oligomers and monomers if heated above its glass transition temperature…
Environmental persistence if mismanaged
PLA will not biodegrade in landfills, marine environments, or home compost within typical…
Fragility and container brittleness over time
PLA can become brittle with age or UV exposure, potentially leading to cracks that may…
BPI Certified Compostable certification on record.
✓Verified PFAS-free by a third party
Karat
Earth 12oz PLA Hinged Deli Container
PLA (polylactic acid) bioplastic, hinged container
Microplastics
PLA is prone to brittleness and stress-cracking over months to years, especially with…
Leaching from unknown coatings or release agents
Loliware does not publicly disclose whether interior or hinge surfaces are treated with…
Food contact surface degradation and hinge failure
Hinged PLA containers are mechanically weaker than solid alternatives. Repeated…
Lower concern; PLA material type inherently avoids intentional PFAS.
⚠Starting grade for this product type
Karat
Earth PLA Hinged Containers
PLA (polylactic acid) bioplastic, plant-based
Thermal leaching of PLA monomers and additives
PLA containers can release trace lactic acid oligomers and processing aids when exposed…
Microplastic shedding from wear and seam degradation
Hinged containers are mechanically stressed at hinge and latch points. Over repeated use…
Undisclosed additives or fillers in PLA formulation
Loliware does not publicly list colorants, plasticizers, or anti-static agents used in…
Lower PFAS risk, but no explicit brand assurance provided.
⚠Starting grade for this product type
Karat
Earth 24oz PLA Hinged Deli Container
PLA (polylactic acid) bioplastic
PLA monomer and oligomer migration
Lactic acid oligomers can migrate into fatty or acidic foods under elevated temperature…
Microplastics
PLA can fragment and shed microparticles if heated to 70°C or higher, or if mechanically…
Degradation and brittleness over storage
PLA degrades faster than polyethylene or polypropylene under UV light, humidity, and warm…
Lower concern; PLA doesn't require PFAS, but verify Footprint's supply chain transparency.
⚠Starting grade for this product type
Graded and flagged Poor and Bad, we’d swap these
Karat
Deli Wrap / Paper Liner Sheets
bleached paper with waterproof coating, type unspecified
PFAS
Coating chemistry is undisclosed. Waterproof paper coatings historically used fluorinated…
Coating degradation and microparticulate shedding
Repeated folding, exposure to moisture, or contact with oily foods can cause coating…
Migration of coating polymers into food
Without coating specification, leaching of oligomers or additives cannot be ruled out.…
Contact the brand for coating details before purchase.
⚠Waterproof or stain-proof treatment
Karat
Deli Paper Sheets
bleached paper with grease-resistant coating
PFAS
Deli paper coatings commonly use fluorinated compounds for water and grease resistance…
Coating degradation and migration under heat
Bleached paper coatings can degrade if exposed to high heat or prolonged moisture…
Microplastic or coating particle shedding
Aged, damaged, or heat-exposed coatings on food-contact paper can shed microscopic…
Deli paper coating source unclear; request PFAS test from Karat.
⚠Waterproof or stain-proof treatment
Karat
Deli Paper Sheets
paper with grease-resistant coating
PFAS
Grease-resistant paper coatings historically relied on PFAS compounds; Karat's silence on…
Coating migration into food under heat
If the coating is a fluorinated or synthetic polymer, contact with warm fatty foods (deli…
Wait for the brand to confirm PFAS status or get testing done.
⚠Waterproof or stain-proof treatment
Karat
Deli Wrap / Paper Liner Sheets
paper with unspecified coating/grease barrier
PFAS
Unknown coating polymer or wax may migrate into fatty foods under heat or acidity. Risk…
Thermal degradation of coating under sustained heat
If coating is synthetic polymer (not wax or silicone), prolonged exposure to hot foods…
Skip until brand discloses coating chemistry and PFAS status.
⚠Waterproof or stain-proof treatment
Karat and PFAS, common questions
- Does Karat have PFAS?
- We graded 8 Karat products, averaging Good (51/100). 4 grade Good or better. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Karat non-toxic?
- Karat Earth Eco-Friendly PLA Round Deli Container is the highest-graded Karat product we have scored, at 100/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which Karat products are lower concern for PFAS?
- The highest-graded Karat products we have scored are Karat Earth Eco-Friendly PLA Round Deli Container, Karat Earth 12oz PLA Hinged Deli Container, Karat Earth PLA Hinged Containers. That is our model-based estimate from materials and public disclosure, not a lab test.
- Which Karat products should I avoid?
- The lowest-graded Karat products we have scored are Karat Deli Wrap / Paper Liner Sheets, Karat Deli Paper Sheets, Karat Deli Paper Sheets. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →