Exfoliating Agents – Cosmetic Uses in Facial and Body Cleansing

What Are Exfoliating Agents?

Exfoliating agents, also called skin scrub agents or body polishers, are solid materials incorporated into cosmetic cleansing and exfoliating products. They may be obtained from natural sources, such as finely powdered seeds or vegetable shells, or produced synthetically, for example as small polymer beads.

When a product containing exfoliating particles is rubbed or massaged onto the skin, the particles provide mechanical abrasion that removes superficial layers of dead skin cells. This can leave the skin feeling smoother and fresher.

Natural and Synthetic Exfoliating Agents

Natural exfoliating materials can include finely ground seeds, shells, and other plant-derived particles. Synthetic particles may also be used to provide a consistent particle size and sensory profile.

The choice of exfoliating material affects the feel of the product during application and the intensity of the exfoliation. Particle characteristics should therefore be considered carefully when developing a scrub or exfoliating cleanser.

Suspending Exfoliating Particles

Exfoliating particles need to remain adequately dispersed throughout the product. Structuring polymers such as xanthan gum or carrageenan can help suspend solid particles by forming a viscoelastic network within the surfactant system.

This allows the particles to remain evenly distributed while also providing a suitable consistency for dispensing and application.

Facial and Body Exfoliation

The appropriate exfoliating agent depends on the intended area of application. Facial skin is generally more delicate than the skin of the body, so exfoliating materials for facial cleansers should be selected with particular care.

For facial products, softer materials such as soft clays or melting jojoba beads can be considered. Body scrubs can generally accommodate a wider range of particle types, depending on the desired level of mechanical exfoliation and product format.

Formulation Considerations

When developing an exfoliating product, the formulator should consider:

• Particle material and hardness
• Particle size and shape
• Desired exfoliation intensity
• Suspension and formulation stability
• Intended application area
• Skin feel during and after use

The exfoliating agent should provide the intended sensory effect without making the formulation unnecessarily harsh, particularly in products designed for facial use.

Source: Handbook of Cosmetic Science and Technology - André O. Barel, Marc Paye, Howard I. Maibach