ProtoClinical k-beauty Isntree Hyper Acid 4 (AHA BHA PHA LAH) 30 Serum 20ml shown as a single slim gray bottle centered upright on a white background
ProtoClinical k-beauty Isntree Hyper Acid 4 (AHA BHA PHA LAH) 30 Serum 20ml shown as a single slim gray bottle centered upright on a white background
ProtoClinical k-beauty Isntree Hyper Acid 4 (AHA BHA PHA LAH) 30 Serum 20ml single slim gray serum bottle centered upright on a pale blue and white background
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Isntree

Isntree Hyper Acid 4 (AHA BHA PHA LAH) 30 Serum 20ml

$7.86
Smooths stubborn texture Helps clear pore buildup Balances excess oil Refines dull, uneven skin Works in just one minute
New concept AHA, BHA, PHA and LHA 30% rinse-off serum, designed for intensive exfoliation after just one minute of use. Key ingredients: Optimized 30% ACID 4 Formulation (AHA 15.3%, BHA 0.1%, PHA 14.61%, LHA 0.01%) This is a high-performance rinse-off exfoliant that helps smooth the skin texture and...
A one-minute acid reset for skin that needs stronger pore and texture care.
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30% Acid Blend 1-Minute Rinse-Off Pore and Texture Care
lactic acid gluconolactone salicylic acid capryloyl salicylic acid
Isntree Hyper Acid 4 (AHA BHA PHA LAH) 30 Serum 20ml
Isntree Hyper Acid 4 (AHA BHA PHA LAH) 30 Serum 20ml Default Title
$7.86
Clinically proven actives Dermatologist tested 100% authentic Korean Cruelty-free
Pairs beautifully with

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$7.86

lactic acid, gluconolactone, salicylic acid, and capryloyl salicylic acid

Active Complex is the primary active in this formulation. It targets excess oil through a mechanism that compounds with daily use, delivering smooths rough texture for a refined, even surface with consistent application.

Active Complex
supports this formula's targeted action
The texture

Lightweight, absorbing serum

  • New concept AHA, BHA, PHA and LHA 30% rinse-off serum, designed for intensive exfoliation after just one minute of use.
  • Key ingredients: Optimized 30% ACID 4 Formulation (AHA 15.3%, BHA 0.1%, PHA 14.61%, LHA 0.01%) This is a high-performance rinse-off exfoliant that helps smooth the skin texture and even out the skin tone by gently removing the dead skin cells and reducing the excess sebum production.
  • 1 minute rinse-off serum with an unique charcoal color and medium-high viscosity.
  • How to use: After cleansing, apply 2-3 drops on the skin, avoiding the eye and lip areas. Manage the product into the skin for about 1 minute, and rinse thoroughly with lukewarm water.
All Skin Types Excess Oil Uneven Texture
Hover the swatch: it ripples like water

How to use

1

Apply a thin layer to clean, dry skin.

2

Leave on for up to one minute only.

3

Rinse thoroughly with lukewarm water.

4

Use a few times per week as tolerated.

5

Follow with soothing hydration and daytime sunscreen.

Full transparency

Ingredients

AHA, BHA, PHA, and LHA are combined for rinse-off exfoliation focused on texture, pores, and excess oil.

This product is formulated using advanced Korean beauty science, combining carefully selected ingredients in precise concentrations to deliver targeted results. The formulation is designed to work synergistically with the skin's natural processes, maximizing efficacy while minimizing the potential for irritation.

The detail

Specs & details

FormatLightweight serum
SizeDefault Title
Skin typesAll Skin Types
Country of originSouth Korea
Before you add to cart

Questions & answers

After cleansing and toning, before moisturizer. Serums deliver actives most effectively on freshly prepped skin.
Yes. Apply from thinnest to thickest consistency and allow each layer to absorb before the next.
Most users notice initial improvement within 2 to 4 weeks. For full benefits like smooths rough texture for a refined, even surface, allow 6 to 8 weeks of consistent use.
Your skin begins adjusting. You may notice improved hydration and comfort before more visible changes like texture refinement become apparent.
Yes, this formula is developed to be compatible with all skin types dealing with excess oil. If you have very reactive skin, patch test on the inner arm before full application.
The formula is designed to be well-tolerated. For pregnancy-specific concerns, consult your healthcare provider. For sensitive skin, patch test before full application.
Active Complex is the primary active that delivers the core benefits of this formula. Consistent use over time maximizes results.
Check the INCI list for the most accurate information on fragrance components. The formula is developed for minimal irritation potential.
Store in a cool, dry place away from direct sunlight. Use within 12 months of opening for optimal freshness and efficacy.
Serums have a higher concentration of targeted actives than essences and a lighter consistency than most ampoules. They deliver the most potent treatment in your routine.
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About the brand

OriginSeoul, KR
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