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How many times a week can you heat style your hair?
There is no fixed safe number of styling sessions per week: what counts is your total heat dose (temperature, contact time, number of passes and how wet your hair is)....
How long should you wait before heat styling after colouring your hair?
Blow-drying is fine straight after colouring, but with a straightener or curling iron you are better off waiting 48 to 72 hours. Here you will find, per colour treatment, how...
Does hair oil work as a heat protectant, or does it actually damage your hair?
Pure hair oils like coconut or argan oil aren't proper heat protectants: the smoke point argument doesn't hold up and oil heats up faster than water. Read what oil does...
How far should you hold the hairdryer from your hair?
Hold your hairdryer about 15 centimetres from your hair and keep it moving: in lab measurements the air was 47 °C at 15 cm, 61 °C at 10 cm and...
Does a silk pillowcase really prevent hair breakage, or is it just marketing?
A silk or satin pillowcase lowers the friction between your hair and the pillow, but independent clinical proof that it reduces hair breakage is missing. Here's what the fibre data...
What does the cool shot on your hairdryer actually do, and when should you use it?
The cool shot on your hairdryer does not close any cuticles: it cools your hair down so the shape you just created sets. Read what cool air does and does...
Does heat styling cause hair loss, or is it breakage?
Heat styling almost never causes real hair loss, but it does cause breakage: your hair root sits protected under your skin. Here is how to tell from a single hair...
Does a bond builder like Olaplex or K18 really repair heat damage?
Bond builders like Olaplex and K18 target broken sulphur bonds, but heat damage consists of five different types of damage. Here's what you can repair, what you can't, and how...
