Most Packaged Avocado Oils Found to be Diluted

A new University of California, Davis study reveals that many products labeled as avocado oil contain cheaper substitute oils.

Updated on Oct. 20, 2026 in Nutrition

Bold flat-color editorial illustration of an avocado and a beaker of oil, symbolizing food product authenticity research. — A UC Davis study found that many commercial avocado oils are mislabeled or diluted, highlighting the need for stricter FDA standards. AI Illustration. Upload story photo >

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Should the federal government establish and enforce strict legal identity standards for food ingredients like avocado oil?

Researchers at the University of California, Davis found that most commercial products labeled as avocado oil lack the chemical markers of the authentic fruit. The study highlights significant label inaccuracies as only two out of 28 chip products tested met authenticity standards.

Why it matters

The absence of a legal definition for avocado oil from the U.S. Food and Drug Administration allows for widespread mislabeling with little regulatory enforcement. This lack of standards complicates efforts to ensure consumers are receiving the genuine product they pay for.

Authentic products averaged 5.3 percent cis-vaccenic acid, while inconsistent products showed only 1.7 percent. Researchers used chemical fingerprinting to analyze the products after finding that the U.S. has no official legal definition for avocado oil.

The players

University of California, Davis

This public research university conducted the study on the authenticity of commercial avocado oil products.

U.S. Food and Drug Administration

This federal agency maintains regulatory jurisdiction over food labeling in the United States.

Codex Alimentarius Commission

This international body develops voluntary food standards to protect consumer health and ensure fair practices in the food trade.

The details

Researchers utilized chemical fingerprinting of fatty acids and sterols to verify product integrity, including testing chips and mayonnaise to ensure manufacturing processes were not responsible for the chemical anomalies. While some products matched the profile of soybean oil, others failed by demonstrating excessive levels of stearic acid and insufficient levels of key fatty acids like palmitoleic acid.

In 2024, the Codex Alimentarius Commission adopted voluntary international compositional standards for avocado oil.
October 2026 marks the publication of the findings regarding the University of California, Davis research study.

Health Landscape

This study follows a pattern set by the Codex Alimentarius Commission's 2024 voluntary international compositional standards for avocado oil, highlighting the gap between international guidelines and current U.S. enforcement. It reflects a growing focus on the necessity of standardized testing for food additives and oils.

Shoppers may be paying premium prices for oils that are diluted or substituted with lower-cost alternatives like soybean oil. Since there is no official FDA definition for avocado oil, consumers cannot rely on labels alone to ensure they are getting pure, high-quality ingredients.

The takeaway

Consumers should remain skeptical of products labeled as avocado oil given the lack of consistent industry regulation and high rates of adulteration. It is recommended to check for high-quality certification seals when available until mandatory national testing standards are established.