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Keratin smoothing

A salon treatment that coats and seals the hair with heat to reduce frizz and loosen curls for months.

Also: keratin treatment, Brazilian blow-dry

Keratin smoothing treatments are applied to the hair and then sealed in with a blow-dryer and flat iron. They reduce frizz, loosen waves and curls, and make hair quicker to blow-dry for several months, fading with washing. Unlike a relaxer, they do not fully break the hair's bonds. Some formulas have released formaldehyde when heated, and health regulators in several countries have issued warnings, so salons are asked to check what they use and ventilate well.

See also

Flat iron Relaxer Frizz

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