COSRX AHA BHA Vitamin C Booster Serum 30ml — Brightening Exfoliating Serum with Niacinamide

COSRX AHA BHA Vitamin C Booster Serum is a lightweight exfoliating and brightening serum that blends fruit-sourced AHAs and BHAs with vitamin C and niacinamide to visibly even tone and hydrate skin.

This 30ml booster features naturally derived extracts—kiwi and dragon fruit—paired with 2% niacinamide in a watery texture that absorbs quickly. Designed to be layered into your routine, the formula aims to refine texture, refresh dullness, and support skin radiance while avoiding parabens, sulfates, phthalates, and animal testing. The concentration and ingredients make it suitable as a targeted treatment rather than a replacement for a moisturizer or sunscreen.

How will this serum change my skin texture?

The serum uses a combination of AHA and BHA sources from fruit extracts to gently loosen dead skin cells and clear pore buildup, helping skin appear smoother over time. Its light, watery base helps the active ingredients sink in without leaving residue, making it easy to layer under other products.

• 28.5% kiwi extract for fruit-acid exfoliation
• 28.5% dragon fruit extract for enzymatic brightening
• BHA-like action to help reduce pore congestion
• Quick-absorbing, non-greasy watery consistency

Can I use it with other active ingredients like retinol or vitamin C?

This booster is designed to sit comfortably in multi-step routines, but pairing acids and strong actives requires gradual introduction. Start by using it a few times per week, then increase frequency as tolerated; separate potent actives by time (morning vs evening) if irritation occurs.

• Introduce slowly: 2–3 nights per week initially
• Avoid layering multiple strong exfoliants at once
• Use sunscreen daily to protect newly revealed skin
• Works well under hydrating serums and moisturizers

What visible benefits can I expect and how fast?

Results vary by skin type and routine, but many users notice improved radiance and a smoother look within 2–4 weeks of consistent use. The niacinamide helps even skin tone while the fruit extracts target dullness and texture, supporting a fresher complexion with ongoing application.

• Brighter, more even tone with regular use
• Reduced appearance of rough patches and dry flakes
• Light hydration without heaviness
• Designed for daily day-or-night layering, as tolerated

Who is this for: This COSRX booster suits anyone looking to add a mild, fruit-based AHA/BHA step to their skincare routine—especially those with dullness, minor texture concerns, or the desire for a lightweight brightening boost. It’s formulated for sensitive-minded users by excluding parabens, sulfates, and phthalates, but anyone with moderate to severe sensitivity should patch-test and introduce the serum slowly. Keep a broad-spectrum sunscreen in your daytime routine to protect freshly exfoliated skin.