the recommended dietary allowances (rdas) were a set of nutrition recommendations that evolved into both the dietary reference intake (dri) system of nutrition recommendations (which still defines rda values) and the rdis used for food labelling. the first regulations governing u.s. nutrition labels specified a "% u.s. rda" declaration based on the current rda values, which had been published in 1968. later, the % u.s. rda was renamed the %dv and the rda values that the %dvs were based on became the rdis.