Advanced The Vitamin C 23 Serum

What you need to know

This is a serum from COSRX priced at ₹1349.

Key ingredients

This serum's star is 23% pure L-ascorbic acid, the most effective and well-researched form of vitamin C. L-ascorbic acid is a powerful antioxidant that brightens skin, evens tone, and stimulates collagen production. However, its high potency also means it can be unstable and irritating, especially at this concentration.

Who should use this

This serum is ideal for experienced vitamin C users with dullness, uneven skin tone, or concerns about well aging who have already built up a tolerance to lower concentrations. It can be beneficial for those with acne and blemishes looking to fade post-inflammatory hyperpigmentation. Normal to oily skin types are most likely to tolerate this concentration.

Who should skip this

Beginners to vitamin C should absolutely skip this product, as starting with 23% L-ascorbic acid is a recipe for irritation, redness, and breakouts. Those with sensitive, dry, or compromised skin barriers should also avoid this serum. Pregnant women should consult their doctor before using any potent active, and if approved, they should opt for a 100% mineral sunscreen to protect their skin.

How to use

Apply 2-3 drops of the serum onto clean, dry skin in the evening. Follow with a hydrating moisturizer. Due to its high concentration, it's crucial to use this serum with a simple, hydrating routine and avoid combining it with other strong actives like retinoids, AHAs, or BHAs in the same routine. Always use sunscreen the next morning.

What users say

With 2792 reviews on Nykaa, users frequently mention the strong brightening effects. Many also highlight the potential for irritation if not introduced carefully or if skin is not accustomed to high concentrations. The texture is often described as thick and slightly gritty.

Price context

At Rs1349, this serum offers a high concentration of L-ascorbic acid at a competitive price, especially considering COSRX's reputation for quality. While there are cheaper vitamin C serums available in the Indian market, they often use derivatives or lower concentrations. For a 23% L-ascorbic acid serum, this is good value, though it's an investment for an active that requires careful use.

Final take

The COSRX Advanced The Vitamin C 23 Serum is a powerhouse for those who know their skin can handle it. If you're an experienced vitamin C user looking for significant brightening and antioxidant benefits, this is an excellent choice. However, approach with caution and respect its potency; it is not a serum for casual use or beginners.

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