COSRX AHA/BHA Clarifying Treatment Toner 150ml

Exfoliate. Clarify. Refine. The K-Beauty Way.

The COSRX AHA/BHA Clarifying Treatment Toner is a cult-status K-beauty toner that delivers gentle yet effective chemical exfoliation with every application. Powered by a dual-acid blend of AHA (Alpha Hydroxy Acid) and BHA (Beta Hydroxy Acid), this lightweight, watery toner sweeps away dead skin cells, unclogs pores, and refines skin texture — revealing a clearer, smoother, and more radiant complexion without harsh physical scrubbing.

Formulated with Natural Betaine derived from sugar beets and a skin-balancing pH, this toner preps and conditions skin for optimal absorption of subsequent skincare steps — making it an essential first step in any serious skincare routine.

Key Benefits

• Dual-Acid Exfoliation: AHA gently dissolves dead skin cells on the surface while BHA penetrates deep into pores to dissolve sebum, debris, and congestion — together delivering comprehensive exfoliation for clearer, smoother skin
• Pore Clarifying & Minimising: BHA's oil-soluble nature allows it to travel inside pores, clearing blackheads, whiteheads, and excess sebum to visibly reduce pore size and prevent breakouts
• Skin Texture Refinement: Regular use smooths rough, uneven skin texture and softens the appearance of bumps, flakiness, and congestion
• Brightening & Glow: AHA promotes cell turnover to reveal fresher, brighter skin beneath — fading dullness and improving overall radiance
• Hydrating & Balancing: Natural Betaine conditions and hydrates skin while the formula maintains an optimal pH level to support the skin's natural acid mantle
• Absorption Booster: By removing the barrier of dead skin cells, this toner significantly enhances the penetration and efficacy of serums, essences, and moisturisers applied afterwards

Key Ingredients

AHA (Alpha Hydroxy Acid): A water-soluble exfoliant that works on the skin's surface to dissolve the bonds between dead skin cells, promoting cell turnover, improving texture, and revealing a brighter, more even complexion.

BHA (Beta Hydroxy Acid / Salicylic Acid): An oil-soluble exfoliant uniquely able to penetrate inside the pore lining to dissolve excess sebum, clear congestion, and reduce inflammation — making it exceptionally effective for acne-prone and oily skin.

Natural Betaine: Derived from sugar beets, Betaine is a powerful humectant that draws moisture into the skin, softens, and improves the overall feel and comfort of the formula without irritation.

How to Use

After cleansing, apply to a cotton pad and gently sweep across the face and neck, avoiding the eye area. Alternatively, pour a small amount into palms and gently pat into skin. Use in the morning and/or evening. Begin with once daily and adjust frequency based on skin tolerance. Always follow with moisturiser and broad-spectrum SPF during the day when using chemical exfoliants.

Note: If new to chemical exfoliants, start with every other day and gradually increase frequency. Avoid using with other strong actives (e.g. Retinol, Vitamin C) in the same routine until skin has adjusted.

Suitable For

All skin types. Especially effective for oily, acne-prone, combination, and congestion-prone skin. Suitable for those targeting enlarged pores, blackheads, uneven texture, or dullness.

COSRX — effective K-beauty actives, without the complexity.