Everything you need to know about straightening.

Keratin straightening. The complete guide.

Keratin is the protein hair is built from. Keratin straightening returns it to the hair and seals it in with heat. Here is everything worth knowing before you book.

Keratin, Japanese or organic. What is the difference.

These three words appear on every salon sign, and they do not always mean the same thing. Here is what stands behind each one, and how to choose.

Collagen straightening. What collagen does.

Collagen is not a marketing word. It is a protein, and it has a precise role in straightening. Here is what it does, and what it does not.

No formaldehyde. No glyoxylic acid. How to check.

"Formaldehyde-free" is written on almost every bottle today. Here is what to ask to know that it is also true.

What hair straightening costs. What determines the price.

Two clients with the same hair length can pay completely different prices, and rightly so. Here is why, and what to ask before comparing prices.

Straightening for frizzy hair.

Frizzy hair is not a problem. It is hair with an open cuticle looking for moisture. The right straightening closes it, it does not break it.

Straightening for coloured and bleached hair.

Coloured hair is hair with gaps. It is the hair that gains the most from protein, provided you choose well.

Straightening during pregnancy and breastfeeding.

This is the question we get asked most. Our answer is short: wait. Here is why.

Aftercare. How to keep it.

The straightening is done at the salon. Keeping it is done at home, and most of the rules are simple.

Straightening formula for salons. How to choose.

A straightening formula is not just another product on the shelf. It is the salon's good name. Here is what to check before a bottle goes on your station.