Think About It Thursday: Why are Tears Salty?

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Almost every food item that we consume has some sort of salt in it. The sodium chloride (salt) gets dissolved by the body and ends up in your blood stream and tears!  Your blood contains a little less than 1 percent sodium chloride and your tears probably contain almost that much. Just for comparison, seawater contains about 3 percent sodium chloride. An adult body contains as much as 1 cup of salt at one time!