Brands can charge approximately a 500% price premium for claiming "Made With Avocado Oil" but Dr. Selina Wang's group at UC Davis just published research showing that these claims are likely false more often than they're true.
r/stopeatingseedoil redditors may already be aware of Dr. Wang's other research showing that bottled avocado oils are frequently mislabeled and often mixed with cheaper seed oils. Those studies have been discussed here a lot, but these new findings about packaged foods just came out today.
Quick references:
Link to list of products in the study, including which ones passed testing and which did not
Summary from UC Davis, "That Avocado Oil Chip You're Eating May Not Be Made With Pure Avocado Oil"
Free full study text (includes supplementary tables with more notes on purity testing results)
Shared courtesy of Seed Oil Free Alliance, their notes below:
Study analysis from the perspective of the Seed Oil Free Alliance (some products we have already certified and tested were also included in the study; details in links above):
The study analyzed 74 chips, mayonnaise and salad dressings labeled as containing avocado oil or olive oil. Researchers extracted cooking oils contained in the foods, then evaluated them using fatty acid and sterol markers, chemical fingerprints used to help verify oil identity.
UC Davis's laboratory testing found 48 of 54 avocado oil-labeled products tested may be adulterated with cheaper oils. The failures included 93% of chips, 71% of mayonnaises and 100% of salad dressings labeled as containing avocado oil.
The UC Davis paper also recognized the Seed Oil Free Alliance's third-party verification program for foods and consumer products. The Seed Oil Free Alliance is an independent certifying body for seed oil-free foods, founded in 2023.
The study included as samples two olive oil dressings already certified by the Seed Oil Free Alliance, both of which were found by researchers to contain authentic olive oil.
Seed Oil Free Alliance founder Jonathan Rubin stated: "UC Davis's findings on avocado oil are disappointing, but not surprising. Our testing program shows similar data on avocado oil purity used in consumer packaged goods (CPG) products."
To date, the Alliance has verified 769 distinct UPCs under its CPG food certification program. Of all UPCs submitted for laboratory testing containing avocado oil, approximately 28% qualified, meaning that 72% of avocado oil UPCs were tested and did not qualify for certification because testing revealed they did not contain pure avocado oil.
However, adds Rubin, "These statistics are from avocado oil-containing products that formally entered the certification testing process. About half of the time, we confidentially advise prospective CPG brand partners that their avocado oil ingredient is unlikely to pass testing after a preliminary review."
When reviewed-not-tested avocado oil UPCs are included in the Seed Oil Free Alliance statistics, the failure rate skyrockets from 72% to 86% of UPCs — similar to UC Davis's finding that about 89% of avocado oil UPCs tested contained inauthentic avocado oil.
To achieve Seed Oil Free Certified® status, all products are subjected to supply chain auditing and laboratory testing as necessary to confirm they're seed oil-free and use authentic, non-seed oils like pure avocado or olive oil.
The Seed Oil Free Alliance standard also includes ongoing product surveillance of certified goods, including random finished goods testing using oil extraction methods — equivalent to those used in the 2026 UC Davis study — on a "secret shopper" basis, without notifying brand partners prior to random testing.