The AHA 2 BHA 2 Blemish Treatment Serum
3H Overnight Drying Lotion

COSRX

The AHA 2 BHA 2 Blemish Treatment Serum

Medicube

3H Overnight Drying Lotion

A spot treatment built around AHA and Glycolic acid, for hydration and smoothing.

A spot treatment built around Mineral sunscreen and Niacinamide, for soothing irritation and barrier repair.

Spot treatment
Spot treatment
17 ingredients
39 ingredients

Brand price

USD 23.00 · checked 25 Sept 2026 · brand's site

Brand price

USD 19.90 · checked 26 Sept 2026 · brand's site

No retailer listed yet
No retailer listed yet
Brand from South Korea
Brand from South Korea

At a Glance

They come out differently on Fragrance-free, EU-allergen-free, Alcohol-free and Cruelty-free; those rows are shaded. Tap any answer to see why.

Key Ingredients

  • PHA1

    Polyhydroxy acids — larger and milder than AHAs.

    Gluconolactone

  • Zinc salt (sebum/soothing)1

    Zinc salts, used for sebum control and soothing.

    Zinc PCA

  • Polysorbates (Tween emulsifiers)1

    Polysorbate (Tween) emulsifiers.

    Polysorbate 20

  • AHA1

    Alpha hydroxy acids — water-soluble chemical exfoliants.

    Glycolic Acid

Benefits

Concerns

  • May Worsen Seborrheic Dermatitis1

    May feed the yeast involved in seborrheic dermatitis.

    Polysorbate 20

Ingredients Side-by-side

Show highlights for:

  • Water (in both products)

    Skin Conditioning

  • Propanediol

    Viscosity Controlling

    0-1 / —

    • Hydrating

  • Polysorbate 20

    Cleansing

    0 / 0

    • Fatty esters (glyceryl stearate, PEG-100 stearate)
    • Polysorbates (Tween emulsifiers)
    • May Worsen Seborrheic Dermatitis

  • Glycolic Acid

    Buffering

    0-1 / —

    • AHA
    • Glycolic acid
    • Anti-Aging
    • Brightening
    • Dark Spots
    • Exfoliating
    • Smoothing

  • Salicylic Acid (in both products)

    Preservative

    • BHA
    • Salicylic acid
    • Acne Fighting
    • Exfoliating
    • Oil Control
    • Pore Refining

  • Gluconolactone

    Skin Conditioning

    • PHA
    • Exfoliating
    • Hydrating

  • Zinc PCA

    Humectant

    • Zinc salt (sebum/soothing)
    • Acne Fighting
    • Oil Control
    • Reduces Irritation

  • Allantoin

    Skin Conditioning

    0 / 0

    • Reduces Irritation
    • Smoothing

  • Sodium Hyaluronate

    Humectant

    0 / 0

    • Hyaluronic acid
    • Hydrating

  • Sodium Hydroxide

    Buffering

    0 / —

  • Alcohol Denat.

    Fragrance

    0 / —

    • Denatured alcohol
    • May Worsen Dryness
    • May Worsen Eczema
    • May Worsen Irritation
    • May Worsen Rosacea

  • Water (in both products)

    Skin Conditioning

  • Calamine

    Skin Protecting

  • Zinc Oxide

    UV Filter

    1 / 0

    • Mineral sunscreen
    • Sunscreen
    • Reduces Irritation
    • Sun Protection

  • Titanium Dioxide

    UV Filter

    0 / 0

    • Mineral sunscreen
    • Sunscreen
    • Sun Protection

  • Glycerin

    Humectant

    0 / 0

    • Possibly animal-derived
    • Hydrating

  • Dimethyl Sulfone

    Viscosity Controlling

    0-1 / —

  • Niacinamide

    Smoothing

    0 / —

    • Niacinamide
    • Acne Fighting
    • Barrier Repair
    • Brightening
    • Dark Spots
    • Even Tone
    • Oil Control
    • Pore Refining
    • Redness Reducing

  • Betaine

    Humectant

    0 / —

    • Hydrating

  • Sodium Chloride

    Fragrance

    0-1 / —

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

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