Page 24 - Silicone & Sulphates

Is Sulphate-free a Good or Bad thing?
There is no research showing that sulfate-free shampoos are any gentler than sulfate-containing shampoos, or that they leave more natural oils.
Sulfates are effective and safe when used as directed and in moderation. It always depends on your hair profile and how you use them.
Brands use sulfate-free for selling more products, however, the surfactants used are just as harsh as sulfates. For example, C14-16 olefin sulfonate has been shown to remove No-Go Silicones and are just as harsh as sulfates.
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