Avocado Oil Fraud: What a New UC Davis Study Reveals About Trusting What's on the Label

What Did the New UC Davis Study Find About Avocado Oil?

A study published in Applied Food Research in July 2026 found that 48 of 54 processed foods labeled as containing avocado oil — 89% — had chemical profiles inconsistent with real avocado oil. [1]

Researchers tested chips, mayonnaise, and salad dressings, using each product's fatty acid and sterol profile as a chemical fingerprint. By category, 93% of chips, 71% of mayonnaises, and 100% of the salad dressings tested failed. [1] For comparison, researchers ran the same test on 20 olive-oil-labeled products, and only one failed. [1]

Price didn't predict the outcome. Some of the highest-priced products in the study failed alongside cheaper ones, and researchers found at least one sample that appeared to contain almost no avocado oil at all. [1]

Which Products Were Flagged, and Which Have Verified Purity?

The two lists below aren't the same product category — one covers processed foods from 2026 testing, the other covers bottled oils checked back in 2020. Keeping them separate matters, since a brand can appear on one list without saying anything about the other.

Results reflect the specific lots UC Davis purchased, not a certification of every batch a brand makes going forward. [1]

Is This the First Time Avocado Oil Has Failed Purity Testing?

No. This is the third UC Davis finding on avocado oil authenticity since 2020, and the pattern hasn't moved in the right direction.

The first study, in 2020, tested 22 bottled avocado oil brands and found 82% were rancid or mixed with other oils. [2] A 2023 follow-up tested 36 private-label (store-brand) avocado oils and found nearly 70% were rancid or adulterated. [3] The 2026 study extends the same problem from bottles into processed foods made with the oil. [1]

Why Does Avocado Oil Get Away With This More Than Olive Oil?

Olive oil has decades of established international purity standards behind it; avocado oil doesn't yet. [3] Researchers point to this gap as the main reason avocado oil keeps failing while olive oil, tested under the same methods, mostly passes.

An international standard for avocado oil, set through Codex Alimentarius, is still in draft form as of 2026. [3] Until it's finalized, there's no enforceable federal definition of what "avocado oil" on a label has to contain.

How Can You Verify What's Really in the Bottle?

There's no reliable at-home test for oil purity. The closest available proxy is independent, third-party verification — not the word "pure" or "cold-pressed" on the front label.

Two signals carry weight: a current third-party certification (such as Seed Oil Free Certified), and a brand willing to share its own batch-testing documentation on request. [4] A front-of-package claim, on its own, is a promise — not evidence. [4]

This is the same gap that runs through the supplement industry, which also has no requirement that products be tested for purity before reaching a shelf. The word "natural" on a label was never proof of anything; independent testing is what actually closes that gap.

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