What if the expensive avocado oil sitting in your kitchen isn’t actually pure avocado oil?
It sounds unbelievable, but researchers have discovered a troubling problem in the American cooking oil market.
Some bottles labeled as avocado oil have contained cheaper oils, while others were already rancid before their expiration dates.
In a 2023 University of California, Davis study, researchers tested 36 private-label avocado oils. Only 31% were found to be pure, and just 36% met their advertised quality standards.
So which brands deserve a closer look?
8 Retail Brands and Labels Worth Investigating
A 2024 investigation by The Washington Post, drawing on UC Davis testing, identified retailers whose avocado oil products had failed purity testing.
The following eight names appeared in reporting about the tested products or their retailers:
1. Walmart — Some private-label avocado oil samples sold by Walmart were found to contain other oils.
2. Trader Joe’s — A tested avocado oil product was flagged for adulteration with less expensive oils.
3. Aldi — Researchers identified purity concerns in a sampled private-label avocado oil.
4. Kroger — Certain tested products did not match the expected composition of pure avocado oil.
5. Meijer — Testing identified adulteration in an avocado oil product sold by this retailer.
6. Safeway — Avocado oil sold through this retailer was among products identified in the investigation.
7. Sam’s Club — The investigation also identified avocado oil sold through this warehouse retailer.
8. Metro — A Canadian retailer included in the research, with a tested product flagged for purity concerns.
Important: These findings concern particular products sampled during earlier testing. They do not establish that every avocado oil currently sold by these retailers is adulterated, and they are not a current recall or blanket warning against all eight brands.
Why Is Fake Avocado Oil Such a Big Problem?
Avocado oil is popular because it contains monounsaturated fats and works well in many cooking applications.
But producing genuine avocado oil can be expensive.
Some products have been found to contain cheaper oils, including sunflower, safflower, or soybean oil.
The concern isn’t that these other edible oils are automatically dangerous. It’s that consumers may be paying premium prices for something different from what the label promises.
For people with certain food allergies or sensitivities, undisclosed ingredients can create additional concerns.
5 Ways to Choose Better Avocado Oil
1. Check the ingredient list. If you want pure avocado oil, the ingredient list should identify avocado oil without additional oils.
2. Be cautious about unusually low prices. UC Davis researchers found that extremely inexpensive avocado oils were more likely to be adulterated. Price alone, however, cannot prove purity.
3. Understand the color. Unrefined avocado oil is often green, while refined avocado oil can be pale yellow. Color alone cannot confirm authenticity.
4. Pay attention to freshness. A strong rancid or unpleasant odor may indicate deterioration. Refined avocado oil can have a very mild smell, so the absence of an avocado aroma doesn’t mean it’s fake.
5. Look for independent testing. Laboratory analysis of fatty acids and other chemical markers is more reliable than homemade refrigerator, color, or taste tests.
Which Brands Have Performed Well in Research?
In the original 2020 UC Davis study, refined avocado oils from Chosen Foods and Marianne’s Avocado Oil were identified as pure and nonoxidized among the samples tested.
CalPure extra-virgin avocado oil also performed comparatively well for purity and freshness.
These findings reflect specific products and batches tested at that time—not permanent guarantees about every bottle sold today.
What About Avocado Oil in Mayonnaise, Chips, and Salad Dressing?
The issue goes beyond bottles of cooking oil.
In July 2026, UC Davis reported that 48 of 54 processed food products marketed as containing avocado oil failed authenticity testing.
The tested products included chips, mayonnaise, and salad dressings.
This finding highlights why a prominent avocado oil claim on the front of a package shouldn’t automatically be treated as proof of purity.
Final Thoughts
Avocado oil can be a nutritious addition to your kitchen, but research shows that authenticity and freshness are genuine concerns.
The solution isn’t to panic or assume every affordable brand is fake.
Instead, compare labels, check independent testing where available, and buy from suppliers with transparent quality practices.
The biggest lesson? A bottle that says “100% pure avocado oil” isn’t necessarily proof of what’s inside.
Have you checked the avocado oil in your kitchen lately? Which brand do you trust most?
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Research supporting the article: UC Davis’s 2023 purity study
UC Davis
, the retailer-specific investigation published by The Washington Post
The Washington Post, UC Davis’s 2020 brand testing
caes.ucdavis.edu, and its July 2026 investigation of avocado-oil-containing foods
UC Davis.
Want to keep a closer eye on what’s in your grocery cart? Take a look at egg brands shoppers may want to check and what canned sardine labels can reveal; for a thrifty kitchen tip, see surprising ways to put banana peels to use.
