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Nanoplasty, keratin or a Brazilian blowout? We compare how each smoothing treatment works, how long it lasts, aftercare and what to know about formaldehyde, so you can pick the right one for your hair.
One bottle of BKT Nano Pro Nanoplasty, four salon services. Here's how stylists use one formaldehyde-free formula to smooth, repair, control frizz and add gloss.
