No. Most skincare masks have a shelf life of about 2 to 3 years unopened, so a mask that expired 3 years ago is well past its prime. Active ingredients like peptides, hyaluronic acid, and collagen lose their punch over time, preservatives break down, and the formula can separate or grow things you really don't want on your face. Even if it looks fine, it won't perform the way it was made to, and irritated skin isn't worth the risk. Toss it and grab a fresh one so you actually get the hydration and glow the formula was designed for.
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