Bernard L. Oser (1899 – January 21, 1995) was an American biochemist and food scientist who was involved in vitamin analysis.
He then served as president of the Chemistry Board from 1959 to 1974 before forming his own consulting firm, Bernard L. Oser & Associates from 1974 to 1995.
His research during this time focused on biological and chemical assays on vitamins, proteins, and other nutrient; pharmaceutical vitamin fortification, stabilization, and availability; toxicology and safety evaluation of food additives, drugs, pesticides, and related chemicals; and the scientific aspects of food law and regulations.
Oser was also active in the Flavor and Extract Manufacturers Association and served on their Expert Panel during his career.
In 2000, the first Bernard L. Oser Award was presented to honor others involved in contributions to food ingredient safety or for leadership in establishing principles for food safety evaluation or regulation.