The old COSRX Vitamin C 23 was basically a sticky, gritty mess that worked miracles. The new one? Smoother. Faster. But I’m suspicious.
They swapped out the L-Ascorbic Acid powder you had to mix yourself for a pre-dissolved formula. That means no more DIY science experiment — but also no more “freshly activated” potency guarantee. The texture is now a thin, watery oil instead of a grainy paste. It absorbs in 8 seconds flat. No waiting 15 minutes before moisturizer. That part is legitimately better.
🔬 **The New Specs**
It’s still $22 for 20ml. Same price. Same orange glass bottle. The claim: “23% pure vitamin C with improved stability and reduced irritation.”
1. **Pre-dissolved L-Ascorbic Acid** – No more shaking a powder into liquid. Just open and apply.
2. **Ethyl Ascorbic Acid added** – A derivative that’s gentler. Smart move, but it’s not the same beast.
3. **pH adjusted to 3.5** – More acidic than the old one (old was ~5.0). That’s actually better for absorption.
⚠️ **What’s Actually Inside**
The hero is still pure L-Ascorbic Acid (23%), but now backed by Ethyl Ascorbic Acid (3%) + Tocopherol (vitamin E) + Ferulic Acid. The ferulic is new — helps stabilize the C so it doesn’t turn orange in 3 weeks.
– **L-Ascorbic Acid (23%):** The gold standard. Brightens, fades spots, boosts collagen.
– **Ethyl Ascorbic Acid (3%):** Gentler, more stable, but less potent. Think of it as training wheels.
– **Ferulic Acid:** Antioxidant that doubles C’s effectiveness. Also stops it from oxidizing instantly.
– **Tocopherol:** Vitamin E. Soothes irritation. Barely there in this formula.
✅ **First Impressions**
It smells like hot dog water. Same as before. That’s the L-Ascorbic acid — it just does. Texture is a slippery, slightly oily serum that disappears into skin. No tackiness. No residue. My face felt plump within 5 minutes. But I missed the gritty “I’m doing something” feeling.
Week 2: My skin looked brighter. No irritation. But the glow felt… softer? Less aggressive. The old formula was a punch in the face. This one is a firm handshake.
💡 **One Thing** – Apply to damp skin. Not bone-dry. The lower pH stings less if there’s a little water to buffer it.
❌ **Real Results**
Dark spots from last summer’s sun damage faded about 30% in 3 weeks. Fine lines looked smoother. But the glow isn’t as dramatic as the old formula. It’s more “I slept well” than “I just had a facial.” My skin didn’t purge. No peeling. That’s new — the old one gave me flakes for 2 weeks.
✅ **Buy if** – You have normal to oily skin and want a stable vitamin C that doesn’t require a fridge.
⏭️ **Skip if** – You’re a purist who wants the strongest possible L-Ascorbic acid (buy the powder version instead).
💰 **Worth it?** – $22 for 20ml. You get 2 months if you use it daily. The results are solid, not spectacular. Fair price for a decent formula.
💬 **Final Verdict**
The reformulation is *better* for everyday use but *worse* for hardcore results. It’s like they made it more user-friendly and less powerful. If you wanted the OG’s intensity, you’ll be disappointed. If you just wanted a vitamin C that works without drama, this is your new best friend.
⭐ **7.2/10** – Safer, smoother, slightly weaker
🛍️ **Where to Buy** – COSRX direct or YesStyle. Grab the 20ml first — the 30ml size isn’t worth it if you hate the texture.