What’s the big deal with sulfate-free formulations?

If you’ve been scanning shampoo claims lately, you’ve probably noticed a shift: more and more shampoo products are labeled “sulfate-free”.

Mintel’s GNPD data shows that since 2020, the number of new shampoo product launches featuring sulfate-free claims has grown at an average annual rate of 4.8%.

But what’s the big deal?

Sulfates like Sodium Laureth Sulfate (SLES) and Sodium Lauryl Sulfate (SLS) have long been the go-to surfactants in rinse-off products. They’re accessible, foam beautifully, and deliver a deep clean. But some sulfates may potentially cause irritation and raise environmental concerns. With regulatory bodies like COSMOS planning to end sulfated surfactants acceptance by the end of 2028, the industry is under pressure to find alternatives.

The Formulation Struggle is Real

Going sulfate-free isn’t just a label swap. It means rethinking how to:

Build viscosity without sulfates

Sulfates like SLES and SLS naturally respond to salt, making it easy to adjust viscosity. Without them, products can feel thin or draggy. Formulators have to rely on polymeric thickeners – such as natural gums or synthetic cellulose derivatives – or carefully balance secondary surfactants to achieve the desired texture consumers love. The addition of natural gums or synthetic cellulose derivatives can impact the texture in an unpleasant way by making it more stringy or gummy, adding complexity and impacting stability.

Maintain rich, stable foam

Sulfates form micelles to enhance spreadability and create a lubricious, slippery sensation during application and rinse-off. Additionally, sulfates such as SLES and SLS are widely recognized for their strong foaming capabilities. Consumers associate foam with cleanliness, and sulfates deliver instant, satisfying lather. Sulfate-free systems often struggle to match this experience. Surfactants like sulfonates, taurates, and glutamates offer alternatives, but they may require boosters or conditioning agents to maintain foam volume and structure. Achieving a luxurious texture and smooth rinse requires careful selection of all ingredients in the formulation.

Keep formulas mild and skin-friendly

One of the main reasons for going sulfate-free is to reduce irritation. But not all sulfate-alternatives are inherently gentle. To keep sulfate-free formulas mild and skin-friendly requires careful selection of all ingredients in the formulation, especially inclusion of emollients, humectants, and conditioning agents. A balanced formulation strategy is essential to deliver both efficacy and comfort.

How can AURIST™ AGC Support Sulfate-Free Formulation Success

Formulators looking to overcome challenges associated with sulfate-free formulations can turn to multifunctional conditioning biopolymer AURIST™ AGC.

AURIST™ AGC has been shown not to negatively impact the texture of the formulation, allowing formulators to enhance conditioning without altering texture.

Sensory Boost: AURIST™ AGC has been shown through sensory evaluation to significantly improves rinsability in wash-off formulations. In formats like body wash and shampoos, AURIST™ AGC can also improve foam appearance and texture, making it creamier and more luxurious.

Reduced skin roughness feel: AURIST™ AGC contributes to a smoother, more conditioned skin feel after rinse-off, helping replicate the silky finish consumers expect from sulfate-based products.