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Category Shop All Best Sellers a-Keratin Smoothing Treatments Treatment Aftercare Tools & Accessories Kits & Bundles
Shop by Hair Need Shampoos & Conditioners Smoothing Hydrating Styling Repairing Color Care Blonde, Silver & White

a-Keratin Smoothing & Refinishing Treatment Kit

(3 oz.)

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So Smooth Blowout Duo

+ Reduce Blow Dry Time By 50%

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News

What Are the Dangers of Formaldehyde in Hair Products?

What Are the Dangers of Formaldehyde in Hair Products?

By Karen DavidsonJuly 10, 2025

Here’s everything you need to know about formaldehyde in hair smoothing treatments—including safe alternatives. Formaldehyde might sound like something you’d find in a lab or woodworking shop—but it’s also found in many hair care products....

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