France’s consumer advocacy group, 60 Millions de consommateurs, has conducted tests on various popular extra-virgin olive oils and raised some concerns. The magazine noted that several bottles contained contaminants associated with plastic packaging and processing, urging regular consumers to take heed.
Findings from the Consumer Tests
The magazine evaluated 24 well-known extra-virgin olive oils available in French supermarkets. While most met expectations regarding taste and basic quality, worries arose during lab tests for unwanted chemicals. Traces of plasticizers and mineral oil hydrocarbons were detected in many samples, with a few exhibiting particularly high levels.
Specifically, the magazine reported higher levels of two phthalates—DEHP and DBP—in four extra-virgin oil brands, advising consumers to avoid those batches.
Plasticizers can leach from certain packaging or processing materials, while mineral oils might originate from lubricants, inks, or transport materials. Even small amounts are concerning because olive oil readily dissolves lipophilic substances. Regular consumers could accumulate exposure over time, which might increase the overall dose.
How Plasticizers End Up in Olive Oil
As a fatty matrix, olive oil attracts chemicals that prefer fat over water. When stored in soft plastic containers or passing through tubing that contains phthalates, these molecules can seep into the oil. Storage conditions, such as heat and extended shelf time, can further exacerbate this issue.
DEHP and DBP phthalates are regulated in the EU due to their identification as endocrine disruptors, which may have reproductive implications at certain exposure levels.
Mineral oil hydrocarbons can have separate origins. They may come from machinery grease or transfer from recycled cardboard and printed materials. The variation seen across different lots suggests that issues are connected more to equipment, handling, and packaging choices rather than the olives themselves.
Brands Highlighted by the Magazine
According to 60 Millions de consommateurs, the extra-virgin oils that showed the highest levels of phthalates include:
| Brand (as tested) | Issue reported by the magazine |
|---|---|
| Naturalia Vierge Extra “Like a Virgin” | Elevated DEHP/DBP levels compared to the panel |
| La Vie Claire Vierge Extra | Elevated DEHP/DBP levels compared to the panel |
| Terra Delyssa Vierge Extra | Elevated DEHP/DBP levels compared to the panel |
| Cauvin Bio “La Bio” | Elevated DEHP/DBP levels compared to the panel |
The magazine emphasized that many other products tested did not raise the same concerns. However, it still recommends that regular consumers switch away from the four mentioned brands and choose low-contaminant oils packaged in glass. It’s worth noting that results can vary by batch, and a single poor lot doesn’t define a brand forever, although consumer demand often leads to quicker corrective measures.
Implications for Your Kitchen
You can mitigate your exposure while still enjoying the benefits of olive oil. Pay attention to packaging, storage, and your shopping habits.
Opt for dark glass or metal tins, verify harvest dates, and keep the oils stored away from heat and light. By following these three steps, you’ll make a significant difference.
- Choose dark glass or tin over plastic, as fatty foods and plastic do not pair well.
- Look for terms like “extra virgin,” “cold extraction,” and check for harvest dates—fresher oil typically undergoes less aggressive processing.
- Store bottles in a cool, dark environment since heat and light can promote chemical migration and oxidation.
- If you don’t cook often, consider buying smaller bottles, as opened oil can spoil quickly.
- Before drizzling generously, take a moment to smell and taste. Fresh olive oil should have a vibrant, fruity aroma with a slight bitterness and peppery finish.
Understanding Olive Oil Labels
Labels provide insights into both quality and potential risks, allowing for better product comparisons.
Key Quality Indicators
- “Extra virgin” indicates low free acidity (≤ 0.8 g/100 g) and no heat refining.
- The country or region of origin establishes traceability; single-origin oils usually have tighter controls.
- Harvest year is more reliable than “best before” dates for freshness; aim for the most recent harvest.
- Varietal names (e.g., Koroneiki, Picual) align flavors and stability with your cooking needs.
- Protected Designation of Origin (PDO/PGI) labels indicate adherence to specific production rules and auditing.
Experts’ Take on Risk
Context is crucial. Most tests find minor amounts of contaminants in fatty foods, and risk is tied to dose, frequency, and specific populations exposed.
Phthalates and Hormonal Disruption
DEHP and DBP are part of a group linked to hormonal interference in animal and epidemiological studies. Regulators in Europe have strict limits for migration from food contact materials. Precautionary advice often centers on infants, children, and those planning pregnancies. Reducing repeated low-level exposures from various sources—food, dust, packaging—can minimalize overall intake.
Mineral Oil Hydrocarbons
MOSH (saturated) may accumulate in the body over time, while MOAH (aromatic) raises additional concerns since some fractions may contain genotoxic compounds. Modern testing can detect even the tiniest traces, prompting food agencies to encourage manufacturers to minimize sources through better packaging and equipment management.
Addressing contamination usually begins with packaging changes, using cleaner lubricants, tighter storage, and improved supplier controls—adjustments consumers might not see, but which yield quick benefits.
The Importance of Packaging and Processing
Certain flexible materials, especially soft PVC, utilize plasticizers that can migrate into oil. Using stainless steel or glass, along with modern elastomers, can considerably reduce this risk. Recycled cardboard lacking functional barriers might release mineral oils, and ink residue from labels can leach through plastic over time. Every detail in the production chain—harvest crates, mills, pumps, tanks, fillers, caps, and pallets—plays a significant role.
Smart Shopping Practices
You don’t need lab equipment to shop wisely. Establish a simple routine:
- Favor glass containers. If buying plastic, use the oil quickly and store it cool.
- Rotate brands that display harvest dates and lot numbers.
- Consider having one oil for finishing salads and another sturdier option (like Picual) for cooking.
- Inquire about your store’s storage practices—better conditions keep products fresh longer.
Additional Tips for Regular Users
Daily consumers often accumulate exposure from various fatty foods like dairy, spreads, nuts, and sauces. Transitioning just a couple of frequently used items to glass packaging can substantially reduce total exposure. If you’re cooking for children or pregnant individuals, prioritize fresh harvest oils in dark glass bottles. Some stores even offer stainless-steel bulk dispensers, as long as they manage stock properly.
Wondering about your household’s risk profile? Track high-fat purchases for a week and note which items come in plastic. On your next shopping trip, switch the top two to glass or metal. This small change can lead to significant reductions in contaminants without sacrificing flavor or cost.
The insights shared here reflect findings from 60 Millions de consommateurs on a panel of 24 oils. Brand quality may differ by lot and date, so staying informed about current test data is crucial, especially if a producer alters packaging or processes.
