The Circle Restless 50ml

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.

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

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

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 improved manageability, detangling and smoother-feeling hair.

It is a commonly used quaternary ammonium compound that helps conditioners spread easily through the hair. It is effective even at low levels, which is why it appears frequently in rinse-off products.

Frizz-prone, coarse or dry hair wanting a smooth, glossy finish.

Some people prefer silicone-free formulas, especially for certain curl routines. It is widely used and helpful in many smoothing products.

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 looking to add softness, shine or light nourishment without a heavy feel.

It is rich in fatty acids and can help smooth the hair cuticle. Often used in blends to support overall hair manageability.

People looking to improve hair strength, smoothness or resistance to breakage.

It forms a lightweight film on the hair to boost softness and resilience without heavy build-up. Often used in strengthening and smoothing formulas.

Most hair types, especially dry or dull hair.

A versatile, well-tolerated conditioning ingredient.

Those wanting added nourishment or antioxidant support in their haircare routine.

Tocopherol is commonly included to help protect oils in a formula from oxidising and to offer light conditioning benefits. It is widely used in both skincare and haircare products.

Most hair types as part of a balanced formula.

Usually present in small amounts to balance the formula.

All products that need protecting from spoilage.

A very common, well-studied preservative used at low levels.

Those interested in gentle preservation systems or sensitive scalps may find it relevant.

It is often paired with other preservatives to improve their effectiveness while allowing for lower usage levels. It also has light moisturising and conditioning properties.

Those looking for formulas that help smooth the cuticle or gently refine the scalp surface.

Lactic Acid can also provide mild hydrating and smoothing benefits in haircare. Its pH-balancing role helps support product stability and performance.

Those using products with oils or fragrance blends that need even distribution through the hair.

It is commonly used at low levels to help stabilise formulas and improve texture. It also aids rinse-off performance without adding noticeable weight to the hair.

Those using products that need clear, stable formulations such as shampoos, serums or sprays.

It is commonly used in haircare as a non-ionic surfactant that improves product texture and clarity. It also supports even distribution of conditioning or fragrance ingredients.

People looking for smoother, easier-to-comb hair or reduced frizz.

Despite its name, it is not a sulphate surfactant but a quaternary conditioning ingredient commonly used in creams and conditioners. It is valued for providing a light, non-greasy conditioning feel.

All products, especially in hard-water areas.

Used in tiny amounts to keep formulas performing reliably.

All products that need a preservative system.

Often paired with other preservatives for broad protection.

Anyone who uses water-based products that benefit from reliable preservation.

It is commonly used alongside other preservation systems to maintain product freshness and extend shelf life. It is generally well tolerated in rinse-off and leave-in products.