Biolage SmoothProof Shampoo and Conditioner Duo 2 x 1000ml

Oily scalps, heavy product users and people who like a strong cleanse.

May feel too cleansing for some dry, curly, colour-treated or sensitive hair types. This depends on the full formula and your hair needs.

People looking for gentle cleansing that doesn't feel stripping.

It is often used alongside other surfactants to improve foam quality and overall mildness. Common in shampoos designed for frequent use.

Oily scalps and routines that need a strong, clarifying wash.

Can be more cleansing than gentler surfactants. Many people use it happily, while others prefer milder options for everyday washing.

Those who like creamy, luxurious-feeling shampoo or conditioner textures.

It also provides a mild conditioning feel, helping formulas spread smoothly through the hair. Its use is common in many everyday cleansing products.

Those interested in how a product’s texture and lather are achieved.

It is a simple mineral salt that helps create a familiar shampoo feel and can influence how a cleanser spreads through the hair.

People who like a rich, stable lather in their cleansing products.

It is often used alongside primary surfactants to enhance texture and mildness. Its viscosity‑boosting effect can also improve the feel of rinse‑off formulas.

Those using products that need lightweight cleansing or stable, uniform formulations.

It is commonly used to solubilise fragrance oils and support smooth, consistent formulations. Its mild nature makes it suitable for a wide range of haircare products.

Those using stylers, treatments or serums that rely on smooth, even application.

It is commonly used in both leave-in and rinse-off products to support stable, easy-to-apply textures. It can also assist with product absorption and consistency.

Anyone who prefers smooth, consistent textures in styling or leave-in products.

It helps formulas stay evenly mixed and glide easily through the hair or onto the scalp. It is widely used because it works in very small amounts and provides reliable texture.

Those interested in how product pH affects scalp comfort or hair cuticle behaviour.

It is used in very small amounts to bring a formula to the desired pH range. Once adjusted, it does not act as a strong alkaline agent in the finished product.

People dealing with flaky scalps, congestion or product buildup.

It is widely used in scalp-care formulas because it breaks down excess oils and debris without needing physical scrubbing. Often found in dandruff-control products.

Those looking for softer, easier-to-detangle hair.

It is derived from guar gum and is commonly used to enhance conditioning in shampoos and conditioners. It can also reduce static and improve manageability.

All products that need a preservative system.

Often paired with other preservatives for broad protection.

Most hair types as part of a balanced formula.

Usually present in small amounts to balance the formula.

A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.

A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.

Those interested in soothing or antioxidant-rich botanical ingredients.

It is commonly used in haircare for its calming and conditioning properties. Its gentle nature makes it suitable for a wide range of formulations.

All products, especially in hard-water areas.

Used in tiny amounts to keep formulas performing reliably.

People looking for smoother, more manageable hair or richer, creamier product textures.

Despite the name, fatty alcohols are moisturising and conditioning rather than drying. They also help stabilise and thicken many haircare formulas.

Most hair types, especially tangle-prone or coarse hair.

A common conditioner ingredient despite the chloride name, which simply describes its chemistry.

People looking for smoother, more manageable hair textures.

Cetyl esters are wax‑like emollients that improve product spreadability and give a soft, conditioned feel. They are commonly used to enhance texture without heaviness.

Those using styling products that benefit from fast evaporation, such as sprays.

It is commonly used at low levels to improve texture and spreadability. It evaporates quickly, leaving minimal residue on the hair.

Damaged, frizz-prone or colour-treated hair wanting targeted smoothing.

Designed to deposit where hair needs it most. Some prefer silicone-free formulas by choice.

Those using products with oils or silicones who want them to rinse evenly without residue.

It is commonly used in shampoos and styling products to support stable, uniform textures. Its mild nature makes it suitable for a wide range of formulations.

Those who enjoy subtly scented haircare products.

It is one of the fragrance components that must be listed separately when present above certain levels. People with known fragrance sensitivities may choose to monitor for it.

A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.

Those who enjoy subtly floral-scented haircare or are monitoring specific fragrance allergens.

It is one of the fragrance allergens that must be listed individually on product labels when present above certain levels. Its presence does not indicate product strength or quality, only that it contributes to the overall scent profile.

A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.

Those seeking gentle, plant-derived ingredients for scalp comfort or lightweight conditioning benefits.

Chamomile extracts are common in both skincare and haircare for their calming properties and light conditioning effect. They can also contribute to a soft, natural feel in formulations.

Those looking for gentle hydration or scalp comfort.

Aloe extracts are widely used in haircare for their lightweight conditioning and calming feel. The powdered form is simply a concentrated version that is rehydrated during formulation.

Dry or dehydrated hair, and many curl and moisture routines.

A very common, well-tolerated humectant used across countless products.

People living in hard-water areas or those wanting products that rinse cleanly and maintain consistent results.

Chelating agents can help prevent minerals from building up on hair and support formula stability.

Most hair types as part of a balanced formula.

Usually present in small amounts to balance the formula.

Those interested in formulas designed to support a cleaner-feeling scalp environment.

It is a well‑established antimicrobial ingredient sometimes used in scalp‑focused products. Its inclusion helps ensure product stability over time.

People looking for smoother, more manageable hair or richer, creamier product textures.

Despite the name, fatty alcohols are moisturising and conditioning rather than drying. They also help stabilise and thicken many haircare formulas.

Most hair types, especially tangle-prone or coarse hair.

A common conditioner ingredient despite the chloride name, which simply describes its chemistry.

Those looking for softer, easier-to-detangle hair.

It is derived from guar gum and is commonly used to enhance conditioning in shampoos and conditioners. It can also reduce static and improve manageability.

Those interested in how a product maintains stability and performance may find this ingredient relevant.

It is commonly used in small amounts to help products stay within an effective pH range. Its presence supports formulation texture and consistency.