Canola Oil · Cast Iron Cookware Seasoning & Oil
Mazola Canola Oil
Lower concern; cooking oil product, not cookware.
Pure canola oil is an uncoated liquid with no surface treatments and doesn't typically contain PFAS unless contaminated during production, which is undocumented for this product. Liquid oils carry lower risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Pure canola oil, uncoated liquid
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
PFAS exposure happens more often with clothing products.
Oxidation and rancidity (storage-related degradation)
Liquid oils degrade over time when exposed to heat, light, or air; rancid oil may produce off-flavors and potentially harmful oxidation byproducts, but this is a use/storage issue, not a manufacturing defect specific to Mazola.
What’s reassuring
Safe base material
Made from ceramic, mineral, or natural fiber with no PFAS risk.
Pesticide residue
Refined canola oil undergoes processing that removes most pesticide residues; no documented contamination events for Mazola canola oil are on record, and regulatory testing typically shows residues below actionable limits.
Source: EPA ↗Solvent residues from extraction/refining
Commercial refining may use solvents (typically hexane) to extract and purify oil; refineries are regulated to remove these to safe levels, and no specific recalls or findings of solvent contamination in Mazola products are documented.
Trans fats from partial hydrogenation
Mazola canola oil is not hydrogenated and contains negligible trans fats; the product complies with FDA labeling rules that require trans fat disclosure if present above 0.5g per serving.
Allergen contamination (cross-contact)
Canola oil itself is not a major allergen; cross-contact risk depends on manufacturing facility practices, which Mazola does not publicly detail, but no widespread allergen recall incidents for this product line are on record.
The full breakdown
What it's made of and why it matters
Mazola canola oil is a refined vegetable oil extracted from canola seeds, processed to remove impurities and then often bleached and deodorized during refining. Unlike cookware with coatings or enamels, liquid oils have no ceramic, enamel, or metal-based glazes that could leach heavy metals. The refinement process removes most contaminants, making it chemically stable at typical cooking temperatures (canola oil smoke point around 400°F / 204°C).
The brand's record and disclosure
Mazola (owned by ACH Food Companies) does not publicly disclose PFAS testing data or make specific third-party certifications for PFAS avoidance on this product. The brand has no major recalls or documented contamination controversies on record for canola oil specifically. Standard regulatory oversight applies through FDA food facility inspections; no independent certification (e.g., NSF, organic) is listed on typical product labeling.
How it compares in its category
Refined canola oil is a standard commodity cooking fat with safety profiles comparable to other refined vegetable oils (soybean, sunflower, safflower). Unlike unrefined or cold-pressed oils, Mazola's refining removes more naturally occurring compounds but also potential contaminants. It sits in the middle of the market in terms of processing transparency and lacks premium certifications (organic, non-GMO verified, or heavy-metal tested) that some alternatives advertise.
If you buy it
Store in a cool, dark place to slow oxidation and extend shelf life (typically 1-2 years after opening). Avoid reheating oil repeatedly or using it past visible signs of degradation (off odor, dark color, or cloudiness). For high-heat cooking (frying, searing), canola oil is suitable up to its smoke point; do not store opened bottles near heat sources. No special maintenance is needed; simply replace when rancidity develops or after the printed expiration date.
What we don’t know
- Basis
- Model estimate, 95% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Canola Oil has made none
Formulations change between production runs, so check the current label. How we grade.
Safer alternatives in Cast Iron Cookware Seasoning & Oil
Coconut Oil
Cast Iron Ultimate Bundle
cast iron, bare or seasoned with coconut oil
Iron leaching into food
Limited concern
Rust and surface degradation
Limited concern
Lower concern; bare cast iron is inherently PFAS-free.
⚠Risky category by default
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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.