Kiehl’s GLP-1 Serum Passes Its Real-World Test
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We may earn commission from links on this page. Each product featured has been vetted and chosen by our editors. When Kiehl’s launched 1cc CollaShot Plumping Serum ($55 for 30 mL; $78 for 50 mL) this summer, the brand called it a serum designed for the skin changes that can follow GLP-1 weight loss. Now, there’s real-world data on how the powerful pink formula performs outside the lab.