Compare Products: The Niacinamide 15 Serum vs Niacinamide Serum 12% Plus Zinc 2%
Ingredient Analysis
Both serums share niacinamide and zinc PCA as core actives. COSRX The Niacinamide 15 Serum adds acetyl glucosamine for brightening and has a cleaner preservative system. Naturium Niacinamide Serum 12% Plus Zinc 2% adds sodium hyaluronate and glycerin for deeper hydration support.
COSRX The Niacinamide 15 Serum includes acetyl glucosamine, which works alongside niacinamide to reduce pigmentation. Naturium Niacinamide Serum 12% Plus Zinc 2% has no equivalent brightening booster.
Naturium Niacinamide Serum 12% Plus Zinc 2% contains both glycerin and sodium hyaluronate, giving it stronger humectant coverage than COSRX The Niacinamide 15 Serum.
Dimethicone gives Naturium Niacinamide Serum 12% Plus Zinc 2% a smoother, more cushioned finish. COSRX The Niacinamide 15 Serum's texture is lighter and more watery.
COSRX The Niacinamide 15 Serum uses ethylhexylglycerin as a preservative booster, which tends to be gentler than phenoxyethanol found in Naturium Niacinamide Serum 12% Plus Zinc 2%.
COSRX The Niacinamide 15 Serum uses free tocopherol, which is the active form of vitamin E. Naturium Niacinamide Serum 12% Plus Zinc 2% uses tocopheryl acetate, which must convert on skin and may be less effective.
- •Niacinamide concentration is undisclosed in both products; efficacy depends heavily on the actual percentage used.
- •Zinc PCA position in both lists suggests it is present at a low concentration, likely under 1%.
- •Tocopheryl acetate conversion to active tocopherol on skin is debated in literature; effectiveness is not guaranteed.
- •COSRX The Niacinamide 15 Serum is guessed to be The Ordinary Niacinamide 10% + Zinc 1% based on formula pattern, but this is not confirmed.
- •Dimethicone in Naturium Niacinamide Serum 12% Plus Zinc 2% may not suit users who avoid silicones or who layer many products.
- •No stated pH values are available; niacinamide and acetyl glucosamine both perform best within a specific pH range.
Analysis generated from both INCI lists using Claude. Ingredient order indicates relative concentration; exact percentages are usually undisclosed.
Who It's Designed For
- Oily and acne-prone skin seeking serious oil control
- Post-acne marks and hyperpigmentation
- Enlarged pores and textured skin
- Users ready to step up from 10% to higher-strength niacinamide
- Those who prefer minimal-ingredient formulas
- Oily and combination skin seeking sebum control
- Uneven skin tone and dark spots
- Fine lines and early signs of aging
- Enlarged pores and textured skin
- Those who want higher niacinamide concentration than standard 10%
Key Ingredients
Niacinamide (15%), Acetyl Glucosamine (2%), Zinc PCA (1%), Allantoin (0.1%)
Niacinamide (12%), Zinc PCA (2%)
Product Composition
33% similarity (8 ingredients in common)
Only in COSRX (8)▾
Only in Naturium (8)▾
User Feedback Patterns
Users consistently report significant reduction in daytime oil and shine. Many describe it as the best niacinamide serum they have tried for sebum control.
Unlike some high-concentration serums, this absorbs quickly without tackiness or residue. Layers well under other products.
The 20ml size (vs. 30ml standard) is a common gripe, especially given the price point.
Users report visible pore improvement around the 3-4 week mark with consistent twice-daily use.
Users who have tried both brands frequently note Naturium feels 'better quality' with faster absorption and less pilling, though acknowledging The Ordinary costs less.
Most users report visible improvement in skin texture and oil control within 2-4 weeks, with more significant changes at the 6-8 week mark.
Some users note a subtle odd scent, though it dissipates quickly after application. Generally not a dealbreaker.
Consistent praise for how this serum absorbs and layers under other products without pilling or feeling heavy.
Which Should You Buy?
Naturium Niacinamide Serum 12% Plus Zinc 2% offers great value at a lower price point. COSRX The Niacinamide 15 Serum may be worth the premium if you want Niacinamide (15%).
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