A lightweight, leave-on exfoliating liquid made with willow bark water, betaine salicylate and niacinamide. COSRX suggests it for people with some experience using acids. From COSRX, a Korean skincare brand.

Key ingredients

• Salix Alba (Willow) Bark Water: A plant-derived base that helps smooth skin texture
• Betaine Salicylate (BHA): Gently exfoliates to help clear the look of clogged pores and blackheads
• Niacinamide: Helps brighten and even the look of skin tone
• Panthenol and Sodium Hyaluronate: Help keep skin hydrated and comfortable

Best for oily, combination and blemish-prone skin with some acid experience.

1. After cleansing, apply a small amount to the face with hands or a cotton pad.
2. Focus on areas with blackheads or clogged pores.
3. Let it absorb fully before serum and moisturizer.
4. Start 2 to 3 times a week and increase slowly. Wear sunscreen during the day.

• Size: 100 mL
• Skin type: Oily, combination, blemish-prone
• Leave-on exfoliant

Patch test on a small area before first use. Avoid the eye area. Because this formula contains exfoliating acids, it can make skin more sensitive to the sun. Wear sunscreen daily and introduce it slowly, starting a few times a week. COSRX advises not layering it with other acids, retinol or vitamin C in the same routine. If you are pregnant or breastfeeding, check with your healthcare provider before use. Stop use if irritation occurs.

How often should I use it?

Start 2 to 3 times a week and increase slowly as your skin gets used to it.

Can I use it with retinol?

COSRX suggests not using it in the same routine as other acids, retinol or vitamin C. Alternate nights instead.

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