Compare Products: The Niacinamide 15 Serum vs Seeking C Vitamin C Face Serum
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
- Those who prefer natural and plant-based skincare ingredients
- Users seeking a gentle vitamin C derivative over L-ascorbic acid
- People who enjoy strongly scented skincare products
- Those looking for a hydrating vitamin C serum with botanical extracts
- Users comfortable with essential oil-containing products
Key Ingredients
Niacinamide (15%), Acetyl Glucosamine (2%), Zinc PCA (1%), Allantoin (0.1%)
Sodium Ascorbyl Phosphate, MSM (Methylsulfonylmethane), Botanical Hyaluronic Acid, Aloe Leaf Juice, Vitamin E (Tocopherol), Jojoba Oil
Product Composition
10% similarity (4 ingredients in common)
Only in COSRX (12)▾
Only in Eight Saints (25)▾
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 either love or dislike the strong citrus-herbaceous scent. Those who enjoy essential oils often rate it highly; fragrance-sensitive users find it overwhelming.
Multiple reviewers note improved skin softness and hydration within the first week. The aloe, hyaluronic acid, and jojoba oil contribute to this effect.
A portion of reviewers experience stinging, redness, or irritation, likely from the essential oil blend. The cinnamon and citrus oils are common triggers.
Users who tolerate the formula report gradual brightening over several weeks. Results are described as subtle rather than dramatic.