[06] COSRX - REFRESH AHA BHA VITAMIN C BOOSTER SERUM 30ML

Suitable for Skin Type:

• Best for dull, uneven, textured, and pigmented skin

• Suitable for normal, combination, and oily skin types

• Can be used on sensitive skin in moderation (formulated to be gentler than pure acids or vitamin C)

What Will It Achieve?

• Gently exfoliates and smooths rough, bumpy skin texture

• Brightens dull complexion and helps fade dark spots and acne scars

• Improves skin clarity and radiance

• Hydrates and balances oil while boosting skin glow

• Supports skin renewal and collagen production

Key Ingredients:

• AHA (Glycolic Acid): Gently exfoliates dead skin cells for smoother skin

• BHA (Betaine Salicylate): Penetrates pores to remove sebum and reduce congestion

• 3-O-Ethyl Ascorbic Acid (Stabilized Vitamin C): Brightens skin and reduces dark spots without the irritation of pure ascorbic acid

• Niacinamide: Evens tone and enhances brightening while reducing inflammation

• Hyaluronic Acid + Allantoin + Panthenol: Hydrate and soothe the skin to offset irritation from actives

Best Used Morning or Evening Routine?

• Best used in the evening to support cell turnover overnight

• Can be used in the morning with SPF 50+ for antioxidant protection

• Start with 2–3x per week, then build to daily use if skin tolerates

Complimented By:

• Hydrating or soothing toners (e.g., centella, mugwort, or hyaluronic acid)

• Barrier creams or calming serums (e.g., ceramides, panthenol)

• Sunscreen during the day is non-negotiable

Avoid Layering With:

• Pure retinol, strong acids (AHA/BHA), or benzoyl peroxide in the same routine

• Pure vitamin C (L-ascorbic acid) – this already contains a stabilized form

• Use with caution alongside other active-rich products unless skin is highly tolerant

Which Step in the Routine Does It Belong?
Serum step – after toner, before moisturizer
Acts as both a treatment serum and a glow booster

Caution (Things to Be Aware Of):

• May cause mild tingling or purging in the first 1–2 weeks

• Always patch test and introduce gradually

• Avoid applying on broken or freshly exfoliated skin

• Must use broad-spectrum SPF in the morning to prevent photosensitivity

Instructions (How to Use):

1. After cleansing and toning, apply 2–3 drops to the face

2. Gently pat into skin until absorbed

3. Follow with moisturizer

4. Use 2–3x/week at night, then increase to daily PM use if tolerated

5. Apply SPF 50+ the next morning