Cosori Pro LE 5.0-Quart Air Fryer
Skip unless Cosori reveals nonstick coating materials or testing.
The Cosori Pro LE body is stainless steel, but the air fryer basket uses a mystery nonstick coating Cosori calls that only. Nonstick cookware historically relied on PFAS, but no third-party testing confirms the actual risk.
The safe swap
Breville
Breville the Smart Oven
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Stainless steel body; nonstick-coated cooking basket (unspecified Teflon-family coating or alternative)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Non-stick, chemistry undisclosed
Advertised as non-stick but coating type is not explained.
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
Category baseline
cookware is a category where PFAS exposure is more common.
Teflon-type coating fume release (thermal decomposition)
If the nonstick coating is Teflon-type coating-based, heating above 500 Fahrenheit can release polymer fumes (Teflon flu risk). Cosori does not specify coating type, so you cannot rule this out. Most home use stays below 400F, which is safer, but accidental preheating misuse or malfunction could pose risk.
Coating degradation and flaking
User reviews on Amazon and Cosori's own site mention nonstick coating peeling after 6-18 months of regular use. This can expose base material or introduce microflakes into food. The actual mechanism (abrasive hand-washing, thermal cycling, or inherent coating weakness) is unclear.
Bacterial or mold growth in sealed heating chamber
Air fryers have narrow, hard-to-clean crevices around the heating element and intake vents. Cosori does not provide detailed disassembly or sanitization guidance. Moisture trapped in these areas could foster mold or bacterial biofilm if the unit sits unused or is stored in humid conditions.
What’s reassuring
Aluminum leaching from internal surfaces
The basket and heating elements are stainless steel, not bare aluminum, so aluminum leaching is not a documented risk for this model. Stainless steel is stable at air-frying temperatures and does not corrode under normal use.
Heavy metals
No recalls or independent testing data exist for lead, cadmium, or chromium in the nonstick coating of Cosori air fryers. However, without third-party audit, this remains unverified.
Source: FDA ↗The full breakdown
What it's made of and why it matters
The Cosori Pro LE has a stainless steel external housing and internal chamber, which are chemically inert under normal cooking temperatures. The cooking basket features a nonstick coating of unspecified chemistry, Cosori does not publicly confirm whether it is Teflon-type coating (Teflon-type), Teflon-type coating-free ceramic, or a proprietary Teflon-family coating. This opacity is the core safety gap: different coatings have different thermal thresholds and degradation profiles. Air fryers reach 400+ Fahrenheit, within the operating range where coating integrity becomes critical.
The brand's record and disclosure
Cosori does not publish ingredient transparency reports, PFAS testing data, or coating material specifications for any of its air fryer models. The brand has not faced major recalls related to nonstick coating safety, but the absence of third-party certification (NSF, FDA material confirmation) or voluntary disclosure is notable for a daily-use kitchen appliance. Cosori's silence on PFAS chemistry suggests either deliberate withholding or supply-chain opacity typical of mid-market kitchen brands.
How it compares in its category
Most budget and mid-range air fryers (under $150) use unidentified Teflon-type coating or Teflon-family coating coatings; Cosori is not unique in this regard. Premium brands like Instant Pot (Omni Plus) and some Ninja models are beginning to disclose Teflon-type coating-free or ceramic options, though confirmation is still inconsistent. The Cosori Pro LE occupies the murky middle: neither budget-opacity nor transparent-premium. Comparable stainless models (Philips, Chefman) face the same coating-identity problem.
If you buy it
Never exceed 400 Fahrenheit to minimize coating stress; check the manual's temperature ceiling and respect it. Inspect the basket coating monthly for flaking, peeling, or discoloration; any visible damage warrants replacement or unit retirement. Hand-wash the basket with soft sponges only, avoid scouring pads and dishwasher, which accelerate coating wear. Replace the basket every 2-3 years of regular use, or sooner if coating degradation is visible; Cosori sells replacement baskets online.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Cosori has made none
Formulations change between production runs, so check the current label. How we grade.
Safer alternatives in Air Fryers
Ninja
Crispi 4-in-1 Portable Glass Air Fryer Cooking System
Glass cooking vessel with stainless steel and plastic components
Thermal fracture or stress in glass cooking vessel
Limited concern
Formaldehyde / VOCs
Limited concern
Electrical hazard or heating element degradation
Limited concern
Glass cooking surface avoids nonstick coatings entirely.
⚠Risky category by default
Ninja
Crispi Pro 6-in-1 Glass Air Fryer
Glass cooking vessel with stainless steel components
Thermal shock / glass breakage risk
Limited concern
Glass construction means lower PFAS concern than typical nonstick air fryers.
⚠Risky category by default
Cosori
Smart Toaster Oven
stainless steel exterior, glass and metal interior
Thermal degradation of gaskets or seals
Limited concern
Grease accumulation and combustion byproducts
Limited concern
Glass door thermal stress and breakage
Limited concern
Lower PFAS concern, toaster ovens rarely use nonstick coatings, though brand makes no transparency statement.
⚠Risky category by default
More air fryers grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.