Shedding the building blocks of life in our tearsJanuary 29, 2026 · 0 Commentsby MARK PAVILONSAre the tears that roll down my cheeks when I’m alone filled with all that I am? I am curious as to what tears contain, chemically, and whether they can used to further our species, even longevity. Scientific studies have shown that tears do contain DNA, primarily from the shed cells of the eye’s surface. I’m sure we’ve all cried heavy, heart-breaking, sorrow-filled tears; tears of joy, and “Hallmark movie” tears. It will hurt, and hurt and hurt, until it doesn’t.