Sulphate-Free & Paraben-Free Shampoo
Learn how sulphate-free and paraben-free shampoos work, what different shampoo ingredients do, and how cleansing, lather, conditioning and texture affect the way a shampoo performs.
Understand how sulphate-free cleansing works, the role of surfactants and conditioning ingredients, why lather and thickness can be misleading, and how shampoos can be designed around different hair concerns.
Explore Sulphate and Paraben Free Shampoo in Detail
Have a specific question? Explore our focused guides to sulphate-free cleansing, SLS vs SLSA, shampoo lather and thickness, conditioning, oils and silicones, coloured hair, choosing the right shampoo, and liquid shampoos versus shampoo bars.
What Does Sulphate-Free Shampoo Actually Mean?
Understand what “sulphate-free” describes, why shampoo still needs surfactants and how milder cleansing systems differ.
SLS vs SLSA: Are They the Same Thing in Shampoo?
Learn why these similar-looking ingredient names shouldn’t be confused and how their roles in shampoo differ.
Does More Lather Mean a Shampoo Cleans Better?
Understand why foam and cleansing aren’t the same thing and why a lower-lather shampoo can still cleanse effectively.
Why Doesn't a Conditioning Shampoo Work Like a Conditioner?
Explore the fundamental difference between cleansing and conditioning and what a conditioning shampoo can realistically do.
Why Does Adding Oil to Shampoo Reduce Lather?
Learn why oils and butters can affect shampoo foam and why reduced lather doesn’t automatically mean poorer cleansing.
Is Sulphate-Free Shampoo Better for Coloured or Highlighted Hair?
Understand why cleansing strength matters when washing coloured or highlighted hair.
How Do You Choose the Right Shampoo for Your Hair Concern?
Explore how concerns such as dandruff, dryness, frizz, damage, dullness, hair fall and colour can influence shampoo choice.
Does Thicker Shampoo Mean Better Quality?
Understand why viscosity affects usability and perception but isn’t, by itself, a measure of shampoo performance.
Natural Oils vs Silicones in Shampoo: What's the Difference?
Learn how natural oils and silicones behave differently in a rinse-off shampoo and why they aren’t necessarily direct substitutes.
Liquid Shampoo vs Shampoo Bars: What's the Difference?
Compare liquid and solid shampoo formats and understand why not every solid hair cleanser is the same.
Learn to Formulate Sulphate- & Paraben-Free Shampoos
Ready to move from understanding shampoo to learning how to formulate it? The Sulphate & Paraben Free Shampoos Course covers the practical formulation and making process that isn’t reproduced in these public guides.
The course includes tested formulations, detailed course notes and supplier information, helping you move from understanding the principles to making finished products of your own.