KEY INGREDIENTS

15% Vitamin C Serum - Korean Clinical Brightening Treatment
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Discover the power of brightening skincare with vitamin C in our clinically-formulated 15% Vitamin C serum. This potent face serum with antioxidants is specifically designed to target dull, uneven skin tone and deliver that coveted Korean glass skin glow.
Why Choose Our Anti-Aging Vitamin C Skincare?
- Clinical-Grade Formula: Our vitamin C products for dull skin feature stabilized L-Ascorbic Acid for maximum potency.
- Multi-Benefit Treatment: This day serum with vitamin C brightens, firms, and protects your skin.
- Targeted Results: Effectively fade dark spots with vitamin C while boosting collagen production.
- Korean Innovation: Part of our comprehensive vitamin C skincare range inspired by K-beauty expertise.
Perfect for Building Your Skin Glow Vitamin C Collection
This serum works beautifully alone or as part of our vitamin C combo packs. Layer with our Niacinamide serum for enhanced pore-refining benefits, or explore our complete collection for a full antioxidant-rich skincare routine.
Experience the ROI's difference – where Korean clinical expertise meets your skincare goals. Join thousands who've transformed their skin with our vitamin C serum collection for radiant skin.
INGREDIENTS
Niacinamide, Ethylhexyl glycerine, Betaine, Glycerine, Phenoxy ethanol, Xanthum gum, Polysorbate, Span, Preservative, Diwater.
HOW TO USE
- Cleanse your face thoroughly
- Apply 2-3 drops to clean, dry skin
- Gently pat and spread evenly
- Use morning and evening for best results
- Always follow with sunscreen during the day
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VITAMIN C
1. Ascorbic Acid (15%)
Benefits:
Brightens skin, reduces pigmentation, and boosts collagen production for a radiant, even-toned complexion.
2. Sodium Hyaluronate (5%)
Benefits:
A powerful humectant that deeply hydrates the skin, plumps fine lines, and improves overall skin texture.
Frequently asked questions
How long does it take to see results from ROI's 10% Vitamin C serum?
You can expect to see initial brightening and improved skin radiance within 2-3 weeks of consistent daily use. For more dramatic results like fading dark spots and evening skin tone, most users see significant improvements after 6-8 weeks. The collagen-boosting anti-aging effects typically become noticeable after 3 months of regular application. For best results, use morning and evening on clean skin, followed by moisturizer and SPF during the day.
Can I use this Korean Vitamin C serum with niacinamide and other active ingredients?
Yes, our pH-balanced 10% Vitamin C serum is formulated to work harmoniously with other skincare actives. It pairs exceptionally well with niacinamide for enhanced pore refining and oil control - try our Vitamin C + Niacinamide Duo for optimal results. You can also use it with retinol (alternate nights), hyaluronic acid, and peptides. Always apply Vitamin C first, allow full absorption, then layer other products.
Is ROI's Vitamin C serum safe for sensitive skin and daily use?
Absolutely! Our clinical-grade formula is specifically designed for sensitive skin with a gentle 10% L-ascorbic acid concentration that delivers maximum benefits without irritation. Unlike harsh vitamin C serums that can cause redness or peeling, our Korean-formulated treatment is pH-balanced and includes soothing ingredients. Start with every-other-day application for the first week, then gradually increase to daily use as your skin builds tolerance. It's non-comedogenic and suitable for all skin types, including acne-prone skin.
What makes Korean clinical vitamin C serums more effective than regular vitamin C products?
Korean clinical skincare combines advanced scientific research with traditional beauty wisdom, focusing on gentle yet highly effective formulations. Our vitamin C serum uses stabilized L-ascorbic acid that maintains potency longer than unstable forms found in many Western brands. The Korean approach emphasizes working with your skin's natural barrier rather than disrupting it, resulting in better absorption, less irritation, and more consistent results. Additionally, our formula includes complementary ingredients that enhance vitamin C stability and bioavailability, ensuring you get maximum benefits from every drop.