New UC Davis Study Finds 100% of Avocado Oil Salad Dressings and U.S. Mayonnaises Fail Purity Testing; Marianne's Named the Study's Benchmark for 100% Pure Avocado Oil

SACRAMENTO, Calif., July 16, 2026 /PRNewswire/ -- A newly released UC Davis study has revealed systemic purity issues within the avocado oil product market, finding that 100% of analyzed salad dressings and U.S. mayonnaises labeled as "Made with Avocado Oil" were adulterated with other,...