10 to 35% U.S. Department of Health and Human Services trans fat Chapter 6 Fats USDA USDA "Dietary Guidelines for Americans 2005" "Dietary Guidelines for Americans 2005" Guía dietaria para americanos de la USDA (2005): Grasas "Dietary Guidelines for Americans 2005" trans fat Full article >>> Chapter 6: Fat "Dietary Guidelines for Americans 2005" Full article >>> USDA 20 to 35% http://www.health.gov USDA Dietary Guidelines for Americans. 2005. Chapter 6 Fats. "Dietary Guidelines for Americans 2005" USDA