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Warren-Tricomi Protect Pre Blow-Drying Calming Serum
Credit: Boyle & Gardner

Warren-Tricomi Protect
Pre Blow-Drying Calming Serum

The water-light formula levels fuzzy strands, tamps down pesky broken ones along a part, and protects with soy protein. “It didn’t leave my thin hair lank or greasy, like others did,” said a tester.

To buy: $17, dermstore.com.