COSRX Alpha-Arbutin 2% Discoloration Serum with Tranexamic Acid 3% Anti-pigmentation Serum for Face with Niacinamide, Blemish Control, Dark Spot Corrector for Even Skin Tone Korean Skincare 50ml vs La Roche-Posay Pure Vitamin C10 30 ML
Side-by-side comparison of scores, ingredients, prices and real customer feedback for COSRX Alpha-Arbutin 2% Discoloration Serum with Tranexamic Acid 3% Anti-pigmentation Serum for Face with Niacinamide, Blemish Control, Dark Spot Corrector for Even Skin Tone Korean Skincare 50ml and La Roche-Posay Pure Vitamin C10 30 ML.
Last verified: 07 Apr 2026 · Based on 24 reviews
COSRX Alpha-Arbutin 2% Discoloration Serum with Tranexamic Acid 3% Anti-pigmentation Serum for Face with Niacinamide, Blemish Control, Dark Spot Corrector for Even Skin Tone Korean Skincare 50ml scores 80.0/100 vs La Roche-Posay Pure Vitamin C10 30 ML at 73.0/100. COSRX Alpha-Arbutin 2% Discoloration Serum with Tranexamic Acid 3% Anti-pigmentation Serum for Face with Niacinamide, Blemish Control, Dark Spot Corrector for Even Skin Tone Korean Skincare 50ml wins on ingredient quality, skin compatibility, value for money.
How Do the Scores Compare?
COSRX Alpha-Arbutin 2% Disc...
COSRX
|
La Roche-Posay Pure Vitamin...
La Roche-Posay
|
|
|---|---|---|
| Overall Score | 80.0 | 73.0 |
| Effectiveness |
74.0/100
Best
|
74.0/100
Best
|
| Ingredient Quality |
81.0/100
Best
|
76.0/100 |
| Skin Compatibility |
85.0/100
Best
|
68.0/100 |
| Texture & UX |
83.0/100
Best
|
83.0/100
Best
|
| Value for Money |
79.0/100
Best
|
62.0/100 |
| Best Price |
£21.89
Amazon UK →
Cheapest
|
£56.23 Amazon UK → |
| Form | N/A | N/A |
| Dose | N/A | N/A |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 15 | 9 |
COSRX Alpha-Arbutin 2% Discolora...
Pros
- ✓Three complementary melanin-inhibiting actives (alpha-arbutin, tranexamic acid, niacinamide) target PIH via distinct pathways for broader, more reliable brightening
- ✓Fragrance-free and lightweight — absorbs quickly with no reported pilling, tackiness, or irritation even on sensitive and acne-prone skin
- ✓Ferulic acid and glutathione add antioxidant synergy, improve formula stability, and support scar healing acceleration
- ✓Layers well under moisturiser and SPF without disrupting other actives in a routine
Cons
- ✗Results are gradual — most users need 6–12 weeks of daily use; not suited to those expecting rapid visible change
- ✗No INCI list provided for this listing, making exact niacinamide percentage and full comedogenicity/safety assessment impossible
- ✗Miscategorised as a vitamin C serum — contains no L-ascorbic acid, MAP, or ethyl ascorbic acid; shoppers expecting classic vitamin C benefits will be misled
- ✗Alpha-arbutin can slowly hydrolyse to hydroquinone under UV exposure, making daily broad-spectrum SPF non-negotiable, not optional
Best For
La Roche-Posay Pure Vitamin C10 30 ML
Pros
- ✓10% L-ascorbic acid at active pH delivers proven brightening and antioxidant protection
- ✓Neurosensine (acetyl tetrapeptide-40) reduces neurogenic inflammation — rare in vitamin C serums and beneficial for reactive/sensitive skin
- ✓Salicylic acid aids penetration and provides mild exfoliation, improving texture and pore clarity
- ✓Lightweight, fast-absorbing aqueous texture with no greasy residue — confirmed by multiple reviewers
Cons
- ✗L-ascorbic acid is inherently unstable — product can oxidise and leave an orange cast on skin, reducing both efficacy and aesthetics (noted in reviews)
- ✗Low-pH formula with dual acids (ascorbic + salicylic) may cause stinging or barrier disruption in highly sensitised or compromised skin
- ✗30 ml at a premium price offers limited duration of use for daily application
- ✗No stabilising cofactors (e.g. vitamin E, ferulic acid) in the formula — reduces antioxidant synergy vs. competitors
Best For
What does the data say about COSRX Alpha-Arbutin 2%... vs La Roche-Posay Pure Vi...?
A multi-targeting brightening serum combining 2% alpha-arbutin, 3% tranexamic acid, niacinamide, ferulic acid, and glutathione — five complementary actives that collectively inhibit melanogenesis via distinct pathways without the pH instability or oxidation risks of vitamin C formulas.
What are the key differences?
Frequently Asked Questions
Which is better, COSRX Alpha-Arbutin 2% Discoloration Serum with Tranexamic Acid 3% Anti-pigmentation Serum for Face with Niacinamide, Blemish Control, Dark Spot Corrector for Even Skin Tone Korean Skincare 50ml or La Roche-Posay Pure Vitamin C10 30 ML? ▼
Is COSRX Alpha-Arbutin 2% Discoloration Serum with Tranexamic Acid 3% Anti-pigmentation Serum for Face with Niacinamide, Blemish Control, Dark Spot Corrector for Even Skin Tone Korean Skincare 50ml worth the price compared to La Roche-Posay Pure Vitamin C10 30 ML? ▼
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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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