[Isntree] Hyper Acid4 AHA BHA PHA LHA 30 Serum 20ml

About this product

Isntree's Hyper Acid4 is a rinse-off exfoliating serum from Korea that combines four types of chemical exfoliants (AHA, BHA, PHA, and LHA) at 30% concentration to dissolve dead skin and unclog pores. It's designed for those with resilient skin who want visible texture improvement and clarity without physical scrubbing, though it requires careful use and sun protection afterward.

Best for

• Skin type: Oily, Combination
• Age range: 20s-40s
• Skin concerns: Acne, Congestion, Large pores, Dullness, Uneven texture, Blackheads
• Mood / Occasion: Weekly treatment, Targeted exfoliation, Pre-makeup prep

Key benefits

• Removes buildup of dead skin cells and sebum with a multi-acid blend that works at different skin depths
• Refines pore appearance and smooths rough texture within 1-2 minutes of contact
• Clears congestion and dullness without mechanical scrubbing, making it gentler than physical exfoliants
• Rinses clean, so there's no residue left on skin after use

Hero ingredients

• Glycolic Acid (AHA): A small-molecule exfoliant that dissolves the "glue" between dead skin cells on the surface.
• Salicylic Acid (BHA): Oil-soluble exfoliant that penetrates pores to clear congestion and acne-causing bacteria.
• Gluconolactone (PHA): A gentler, larger-molecule exfoliant that hydrates while it exfoliates, suitable for sensitive areas.
• Capryloyl Salicylic Acid (LHA): A newer form of salicylic acid that's less irritating while still unclogging pores.

How to use

After cleansing, apply 2-3 drops to your face, avoiding eyes and lips. Gently massage for about 1 minute, then rinse thoroughly with lukewarm water. This is a treatment product, not a leave-on serum-use it once or twice weekly to start, and always follow with sunscreen during the day, as exfoliants increase sun sensitivity.

Authentically Korean

Isntree is a Korean skincare brand known for multi-functional actives, and we source directly from authorized Korean suppliers to guarantee authenticity.