Reductions in human consumption of sodium [*], esp. as its compound sodium chloride: the primary preservative and honestly taste-enhancing [×] "salt" is medically advised--if not dictatorially imposed--on people with certain health conditions which are widely believed to be made worse by the compound (yes, there is a contrary minority point of view, altho' a citable source is unavailable at this time).
"Na" is the chemical symbol for the metal element sodium, most commonly consumed in the form of its very edible compound with the gaseous element chlorine ("Cl"), thus NaCl, known in English indiscriminately as "salt".
"Na" is the element's abbreviation (properly omitting termination by the period symbol) because of the postclassical Latin "natrium", present in the lucrative solid product of dried sea-water that was known in ancient times in Latin as "sal, salis (m.)". The latter corresponds to the Greek word «῾άλϛ, ῾αλόϛ» ("háls, halós") when inflected as masculine via the definite article «῾ο» ("ho). But when inflected as feminine via the definite article «῾η» ("hē), it means "sea", thus the prefix borrowed into Latin as "hali-".
This correspondence of word-sounds for this substance, known in ancient civilizations to be necessary for life, fails in Semitic, e.g., in Hebrew, in which "salt" has the root "M-L-Ch", meaning "salt" and serving as a metaphor for a "sea". Lexicographers (e.g., Gesenius) connect not only the ancient Phœnician initial letter corresponding to ‘M’, but also the shape & name of the greek letter «μ», with the shape of waves in water.
Note ×: That's "honestly" as contrasted with monosodium glutamate, which is used, i.a., to enhance flavors of foods prepared with cost-cutting ingredients. I can't think of any drawbacks other than philosophical (e.g., the proper role of government) to it being banned as an ingredient in food commercially formulated or prepared to be consumed by us humans.
Note *: This topic, being originated on the traditional feast commemorating the ad hoc Christian coälition navy's historic defeat of a Muslim navy in the Battle of Lepanto (off the W. coast of modern Greece) in 1571 [#], is a stub of sorts. So the linguistic overview is presented to provide some content related to the title of the topic; that's instead of lazily posting nothing more than a question, thus expecting other CathInfo members to do all the research for it. Alas, its originator has a newfound family-related interest in this topic, to which he will post more content from time to time. He encourages credible postings by other C.I. members, which he assumes might include tasty low-sodium recipes. He also assumes that there are foodies focused & active on the topic in the Blogosphere, but the issue is too new a concern for him to have yet begun searching for them.
Note #: Relevant artwork still viewable, e.g., on C.I. at "‘Our Lady of the Rosary’, [originated] on: October 07, 2007, 15:33:02", by Kephapaulos. <https://www.cathinfo.com/art-and-literature-for-catholics/our-lady-of-the-rosary/>.