We didn't want to take the risk

In high concentrations, these surfactants are used to clean machinery, are used in laundry detergents, and household cleaning products. We decided early on, despite advice from some manufacturers that either surfactant (Sodium Lauryl Sulphate or Sodium Laureth Sulphate) was fine to use, that we didn't want to compound our products with a contentious product. We also knew there were better options out there for people with sensitive skin. 

Why so contentious? A quick Google search will reveal some truly shocking stories about SLS and SLES. Scientific research has not found any link between SLS or SLES causing cancer.

It is, however, extremely irritating to skin, and even small doses can cause contact dermatitis. This is our main reason for avoiding these products in our formulations.

You can read more about this here, here and here.