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COSRX Niacinamide 15… vs Medicube Deep Vita A… — Which Is Better? | Gracie

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/COSRX Niacinamide 15 Serum
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/Medicube Deep Vita A Retinol Serum

COSRX Niacinamide 15 Serum vs Medicube Deep Vita A Retinol Serum

Head to head

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COSRX

Niacinamide 15 Serum

serumbudget

7.6

Buy at Olive Young

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Ingredients

Niacinamide
Retinol
Hyaluronic Acid
Salicylic Acid

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Honest skincare intel. No jargon, no gatekeeping — just the ingredients decoded.

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Medicube

Deep Vita A Retinol Serum

serum

8.9

Score comparison

Medicube Deep Vita A Retinol Serum takes this one, winning 3 of 5 attributes.

COSRX wins 0

Tied 2

9.0

COSRX

Medicube

Ingredient face-off

19% overlap

13COSRX

10Shared

53Medicube

Only in COSRX Niacinamide 15 Serum

3 unique

Zinc Pca Carbomer Arginine

Shared ingredients

10 in common

Water Niacinamide Glycerin Butylene Glycol 2-Hexanediol Panthenol Allantoin Sodium Hyaluronate Adenosine Ethylhexylglycerin

Only in Medicube Deep Vita A Retinol Serum

43 unique

Dipropylene Glycol Propanediol Coco-Caprylate/Caprate Squalane Polyglyceryl-3 Distearate Dimethyl Isosorbide Pentylene Glycol Hydrogenated Lecithin Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Why Medicube Deep Vita A Retinol Serum comes out ahead

Where Medicube Deep Vita A Retinol Serum really shines is hydration efficacy, scoring 9.8 compared to COSRX Niacinamide 15 Serum's 6.7. With Dipropylene Glycol, Butylene Glycol, and Glycerin in its top ingredients, Medicube Deep Vita A Retinol Serum delivers stronger moisture-binding capability.

Active Ingredient Strength is another area of separation. Medicube Deep Vita A Retinol Serum scores 6.7 here versus 5.1 for COSRX Niacinamide 15 Serum. That difference comes down to how each formula is built — the ingredient list tells the story.

Medicube Deep Vita A Retinol Serum brings Niacinamide, Allantoin, and Adenosine as actives, while cOSRX Niacinamide 15 Serum relies on Niacinamide, Allantoin, and Zinc Pca. Both approaches have merit, but the positioning and supporting ingredients make the difference.

Best for your skin type

COSRX Niacinamide 15 Serum is better if you have

Sensitive skin — the low-irritation formula keeps things gentle
Anyone who prefers clean, well-vetted formulations

Medicube Deep Vita A Retinol Serum is better if you have

Sensitive skin — the low-irritation formula keeps things gentle
Dry or dehydrated skin that craves moisture, thanks to Dipropylene Glycol
Anyone who prefers clean, well-vetted formulations

Value comparison

COSRX Niacinamide 15 Serum comes in at budget pricing with a 7.6 score, which is solid value at that tier.

Our verdict

✶ Our verdict

+1.3 lead

Medicube Deep Vita A Retinol Serum wins this comparison with a meaningfully stronger ingredient profile and overall score.

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7.6COSRX

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8.9Medicube

Frequently asked questions

Which is better: COSRX Niacinamide 15 Serum or Medicube Deep Vita A Retinol Serum?

Based on ingredient analysis, Medicube Deep Vita A Retinol Serum scores higher overall. See the full score breakdown above for details on each attribute.

Do COSRX Niacinamide 15 Serum and Medicube Deep Vita A Retinol Serum share ingredients?

Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.

What's the main difference between COSRX Niacinamide 15 Serum and Medicube Deep Vita A Retinol Serum?

The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.

Full analysis: COSRX Niacinamide 15 Serum→Full analysis: Medicube Deep Vita A Retinol Serum→

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Acrylates/C10-30 Alkyl Acrylate Crosspolymer

+33 more