SkinCeuticals Discoloration Defense Serum for Dark Spots vs Medicube TXA Niacinamide Serum

SkinCeuticals

Medicube

A serum built around Niacinamide and Tranexamic acid, for barrier repair and hydration.

A serum built around Niacinamide and Tranexamic acid, for hydration and barrier repair.

Serum

14 ingredients

39 ingredients

Brand price

USD 115.00 · checked 28 Sept 2026 · brand's site

Brand price

USD 26.00 · checked 26 Sept 2026 · brand's site

No retailer listed yet

Brand country not recorded

Brand from South Korea

At a Glance

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

Niacinamide1
Vitamin B3 — supports the barrier and evens tone.
Niacinamide
Tranexamic acid1
Used topically for stubborn pigmentation and melasma.
Tranexamic Acid
Kojic acid1
A fungal-derived tyrosinase inhibitor used on pigmentation.
Kojic Acid

Alpha arbutin1
A gentler glycosylated relative of hydroquinone.
Arbutin
Panthenol (provitamin B5)1
Provitamin B5 — a humectant and soother.
Panthenol
Hyaluronic acid4
Hyaluronic acid and its salts; a humectant that binds water to the skin.
Hyaluronic Acid, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate Dimethylsilanol
Niacinamide1
Vitamin B3 — supports the barrier and evens tone.
Niacinamide

Hydrating4
Boosts hydration and relieves dry, tight skin.
Butylene Glycol, Glycerin, Hydroxyethyl Urea, Propylene Glycol
Barrier Repair5
Strengthens and restores the skin's natural barrier.
Allantoin, Caprylyl Glycol, Glycerin, Niacinamide, Propylene Glycol
Reduces Irritation1
Eases discomfort and supports skin resilience.
Allantoin
Redness Reducing3
Soothes visible redness and calms irritation.
Allantoin, Niacinamide, Tranexamic Acid

No concerns found

May Worsen Seborrheic Dermatitis3
May feed the yeast involved in seborrheic dermatitis.
C12-14 Alketh-12, Palmitoyl Tripeptide-5, Sodium Acetylated Hyaluronate
May Worsen Irritation1
May cause stinging, redness or sensitivity.
Rosa Centifolia Flower Oil
May Worsen Eczema1
May worsen itching or irritation for eczema-prone skin.
Rosa Centifolia Flower Oil
May Worsen Rosacea1
Can trigger flare-ups in rosacea-prone skin.
Rosa Centifolia Flower Oil

Show highlights for:

Aqua
Solvent
0 / —
Butylene Glycol (in both products)
Humectant
1 / 0
- Hydrating
Niacinamide (in both products)
Smoothing
0 / —
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
Hydroxyethylpiperazine Ethane Sulfonic Acid
Buffering
0-1 / —
Glycerin (in both products)
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Tranexamic Acid (in both products)
Skin Conditioning
- Tranexamic acid
- Brightening
- Dark Spots
- Even Tone
- Redness Reducing
Propylene Glycol
Humectant
0 / 0
Hydroxyethyl Urea
Humectant
Kojic Acid
Antioxidant
- Kojic acid
- Brightening
- Dark Spots
Caprylyl Glycol
Emollient
0-1 / —

Water
Skin Conditioning
Niacinamide (in both products)
Smoothing
0 / —
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
Glycerin (in both products)
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Butylene Glycol (in both products)
Humectant
1 / 0
- Hydrating
Tranexamic Acid (in both products)
Skin Conditioning
- Tranexamic acid
- Brightening
- Dark Spots
- Even Tone
- Redness Reducing
Arbutin
Antioxidant
- Alpha arbutin
- Brightening
- Dark Spots
Diethoxyethyl Succinate
Solvent
Chlorphenesin (in both products)
Preservative
0 / —
C12-14 Alketh-12
Emulsifying
- Fatty alcohols (Malassezia)
- May Worsen Seborrheic Dermatitis
Ethylhexylglycerin
Skin Conditioning

These ingredients are found in both products.

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

Butylene Glycol
Fragrance, Humectant, Skin Conditioning, Solvent, Viscosity Controlling
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
Learn more about Butylene Glycol →
Niacinamide
Smoothing
Niacinamide is niacinamide.
Learn more about Niacinamide →
Glycerin
Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care, Perfuming, Humectant, Skin Protecting, Solvent, Viscosity Controlling
Glycerin may be plant, synthetic or animal depending on the supplier.
Learn more about Glycerin →
Tranexamic Acid
Astringent, Skin Conditioning
Tranexamic Acid is tranexamic acid.
Learn more about Tranexamic Acid →
Chlorphenesin
Antimicrobial, Preservative
Chlorphenesin is the organic compound that conforms to the formula:
Learn more about Chlorphenesin →
Xanthan Gum
Binding, Emulsion Stabilising, Gel Forming, Skin Conditioning, Cleansing, Emulsifying, Viscosity Controlling
Xanthan gum
Learn more about Xanthan Gum →
Disodium EDTA
Chelating, Viscosity Controlling
Disodium dihydrogen ethylenediaminetetraacetate
Learn more about Disodium EDTA →