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There is no way that our tears cannot be salty because salt, that is, sodium chloride is very essential for various bodily functions. Sodium in salt conducts nerve impulses, helps all the muscles to contract, etc. Chloride is an essential part of our stomach acid.

According to research, there is about half a pound of salt in our bodies. Now, if we have so much salt, it makes sense that our bodily fluids including sweat, blood and tears naturally have some salt in them.

Besides this, it would take a lot of cellular energy to make sure that our tears were 100% pure water.

Moreover, as some tears are continuously produced to lubricate our eyes, it is believed that salt in those tears inhibits the growth of bacteria, thus preventing infections!!