Cosrx The Vitamin C 13 Serum 20Ml

Achieve brighter and more even-toned skin with the COSRX The Vitamin C 13 Serum, a gentle yet effective vitamin c serum formulated with 13% Vitamin C. Perfect for beginners or those with sensitive skin, this serum delivers visible brightening results without causing irritation.

This lightweight vitamin c serum helps reduce the appearance of dark spots, acne marks, and dullness, revealing a clearer and more radiant complexion over time. It also supports smoother skin texture and improves overall skin clarity with consistent use.

Infused with hydrating and soothing ingredients, the formula keeps the skin comfortable while enhancing glow. The fast-absorbing texture ensures it blends seamlessly into your routine without leaving a sticky or heavy feel.

Ideal for daily use, especially for those starting with Vitamin C, this serum helps maintain a healthy, luminous look while being gentle on the skin.

Key Features:

• Beginner-friendly vitamin c serum with 13% Vitamin C
• Helps brighten skin and reduce dark spots
• Improves overall skin tone and texture
• Lightweight, non-sticky, and fast-absorbing formula
• Suitable for daily use and sensitive skin

Add this balanced vitamin c serum to your skincare routine for smoother, brighter, and healthier-looking skin.

FAQs

What is COSRX The Vitamin C 13 Serum?

A gentle, water-based daily vitamin C serum with 13% pure L-ascorbic acid to brighten skin, fade dark spots, and improve overall tone without irritation.

Key ingredients?

13% Pure Vitamin C (L-Ascorbic Acid), Tocotrienol (Super Vitamin E), Hyaluronic Acid, Allantoin, Glutathione, Niacinamide, and 3-O-Ethyl Ascorbic Acid.

What skin concerns does it help with?

Hyperpigmentation, dark spots, freckles, dullness, uneven skin tone, early signs of aging, and post-acne marks.

Who should use this?

Anyone wanting a daily vitamin C for brightening and anti-aging. The 13% concentration is ideal for those new to vitamin C or with sensitive skin.

Is it suitable for sensitive skin?

Yes! It's designed to be gentle with a pH of 3.5 and passed primary skin irritation tests. Users with sensitive skin report no stinging.

What is the texture like?

Lightweight, watery, and non-sticky. It absorbs quickly without leaving a greasy residue.

Does it have a scent?

Yes, many users note a distinct "fishy" or "copper-like" smell that dissipates quickly after application.

What is the color?

Fresh batches have a slight yellowish tint, indicating active vitamin C. If it turns dark yellow/orange, it may be oxidized.

How do I use it?

Apply 3-4 drops to clean, dry skin in the morning after cleansing and toning. Gently pat in and wait 1-2 minutes before moisturizer.

Do I need sunscreen?

Yes! Always follow with a broad-spectrum SPF 30+ sunscreen, as vitamin C enhances but doesn't replace sun protection.

How long does it take to see results?

Some users report brighter, smoother skin within 3-5 days, with significant improvement in dark spots over 4-8 weeks of consistent use.

Can I use it with other active ingredients?

Yes, but avoid combining with strong exfoliants (AHAs/BHAs) or retinol in the same routine. Use vitamin C in the morning and other actives at night.

How long does the 20ml bottle last?

With 3-4 drops daily, it lasts approximately 1-2 months. Use within 2 months of opening for maximum potency.

How should I store it?

Store in a cool, dark place away from light and heat. Refrigeration can help maintain potency and freshness.

Is it vegan and cruelty-free?

Yes, COSRX is a cruelty-free brand. The serum is formulated without parabens, alcohol, sulfates, and artificial fragrances.

Is it suitable for oily skin?

Yes, the lightweight, non-comedogenic formula works well for oily and acne-prone skin.

Does it help with acne scars?

Yes! Users report it fades post-acne marks and hyperpigmentation effectively with regular use.

What is the difference between this and the Vitamin C 23 Serum?

The 13% serum is gentler and ideal for daily use, while the 23% serum is more potent. Start with 13% to build tolerance.

How does it compare to other vitamin C serums?

Users compare it favorably to expensive brands like Skinceuticals, noting similar results at a fraction of the price.