The formaldehyde in keratin hair treatments has been flagged as potentially cancer-causing. Experts explain exactly what you need to know about before trying it.

"The treatment wraps keratin around each hair strand, typically using heat, but as the keratin is protein-based, too much of it can make the hair brittle and snappy." Cue breakage and split ends.

Protein treatments for hair can be helpful if you have damaged, frizzy, dry, brittle, or fragile hair. Proteins like keratin, biotin, and plant-based proteins are used in these treatments that ...

According to experts, that short answer is yes. Keratin treatments (also known as Brazilian blowouts in some salons) is the chemical process of temporarily smoothing frizzy hair.

The treatment involves applying a keratin-rich formula to your hair, followed by heat sealing with a flat iron to lock in the protein. This process smooths the hair cuticle, reducing curl and frizz.

Even our diet can cause a keratin deficiency in our hair. Lack of protein can cause problems like dry, brittle, and frizzy hair. Losing up to 100 strands of hair every day is considered normal.

What is a keratin treatment? “Keratin treatments work by infusing active keratin protein into the porous parts of dry, dehydrated hair,” explains New Jersey-based hairstylist Michelle Cleveland.

Just a casual 30,000 five-star reviews agree: This is the best protein treatment for hair. Ever since I got highlights, I started working this protein treatment through my hair once a month to ...

TikTok/__chels.__ “The first shampoo after the treatment, my hair is a tangled mess,” she said. “I put in some cureplex, an intense repair treatment, gave my scalp a good old massage.