the rdas (and later the rda values within the dri) were regularly revised to reflect the latest scientific information, but although the nutrition labeling regulations were occasionally updated, the existing rdi values were not changed, so that until 2016 many of the dvs used on nutrition facts labels were still based on the outdated rdas from 1968. in 2016, the food and drug administration published changes to the regulations including updated rdis and dvs based primarily on the rdas in the current dri.