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COSRX The Vitamin C… vs Medicube Deep Vita A… — Which Is Better? | Gracie

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COSRX The Vitamin C 23 Serum vs Medicube Deep Vita A Retinol Serum

Medicube Deep Vita A Retinol Serum scores 8.9/9.8 vs COSRX The Vitamin C 23 Serum at 6.7/9.8. Medicube Deep Vita A Retinol Serum wins for hydration.

Head to head

COSRX

The Vitamin C 23 Serum

serumbudget

6.7

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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.

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

Medicube wins 3

9.0

COSRX

Medicube

Ingredient face-off

13% overlap

11COSRX

7Shared

53Medicube

Only in COSRX The Vitamin C 23 Serum

4 unique

Ascorbic Acid Ethyl Ascorbyl Ether Sodium Lactate Ethyl Hexanediol

Shared ingredients

7 in common

Water Propanediol Panthenol 2-Hexanediol Sodium Hyaluronate Allantoin Tromethamine

Only in Medicube Deep Vita A Retinol Serum

46 unique

Dipropylene Glycol Butylene Glycol Glycerin Niacinamide Coco-Caprylate/Caprate Squalane Polyglyceryl-3 Distearate Dimethyl Isosorbide Pentylene Glycol Hydrogenated Lecithin+36 more

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 The Vitamin C 23 Serum's 3.9. 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 4.1 for COSRX The Vitamin C 23 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 Dipotassium Glycyrrhizate as actives, while cOSRX The Vitamin C 23 Serum relies on Ascorbic Acid and Allantoin. Both approaches have merit, but the positioning and supporting ingredients make the difference.

Best for your skin type

COSRX The Vitamin C 23 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 The Vitamin C 23 Serum comes in at budget pricing with a 6.7 score, which is reasonable for what you get.

Our verdict

✶ Our verdict

+2.2 lead

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

6.7COSRX

8.9Medicube

Frequently asked questions

Which is better: COSRX The Vitamin C 23 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 The Vitamin C 23 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 The Vitamin C 23 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 The Vitamin C 23 Serum→Full analysis: Medicube Deep Vita A Retinol Serum→

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