Food Labeling Requirements - LabelCalc New August 2019 FDA Industry Guidance for Food Labeling: Folate, Niacin, Vitamins A, D & E. As of August 2019, the FDA released new guidance for the industry concerning food labeling for certain micronutrients listed on the nutrition facts label on food products.. Folate, Niacin, as well as Vitamins A, D, E are all receiving a do-over in their appearance on the nutrition facts label to be more ...