Question: when were nutrition labels introduced in the us
Answer: 1990

title: Nutrition facts label
text: new adult Daily Values is provided at Reference Daily Intake. As of October 2010, the only micronutrients that are required to be included on all labels are vitamin A, vitamin C, calcium, and iron. To determine the nutrient levels in the foods, companies may develop or use databases, and these may be submitted voluntarily to the U.S. Food and Drug Administration for review. Additionally, there is a requirement for ingredients to be listed in order from highest to lowest quantity, according to their weight. The label was mandated for most food products under the provisions of the 1990 Nutrition Labeling