When it comes to hair, this movement has played out in a shift towards sulphate-free products. But what exactly does this mean and what benefits (if any) does it have?
According to Annabelle Personeni, botanical chemist for hair brand Al’chemy, sulphates are a commonly used surfactant (a mix of molecules that attract water and oil) that creates the cleansing and foaming effect you see in most shampoos.
An artificial chemical derived from petrochemicals, you may have seen it in the ingredients list as Sodium Lauryl Sulfate (SLS) and Sodium Laureth Sulfate (SLES).
They work by separating grime, dirt and oil from your hair, while allowing it all to be rinsed off with water.
Although commonly used in shampoos for this reason (they’re also one of the cheapest cleansing ingredients to use for mass production) they can cause problems in some individuals.
“They can actually strip away moisture and cause irritation to the scalp,” explains Personeni. (Post continues after gallery.)