Do Lash Extensions and Promades Expire? Technically, yes — but the real story isn’t about time, it’s about quality. Lash extensions and promades don’t “expire” the way food does. They degrade when the synthetic fiber loses its structure — meaning the curl relaxes, the surface loses smoothness, or the base starts to flake. This degradation depends far more on how the lashes were made than on how long they’ve sat on a shelf. That’s why two trays from different brands can age very differently — and why high-grade manufacturing like...
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