So Tatcha quietly reformulated their Dewy Serum. Replaced squalane with a synthetic ester. Why? Probably margins. Your skin might care—a lot.
The old version soaked in like a glass of water. New one sits. Just sits. That’s the problem.
⚠️ **What You’re Paying For Now**
$89 for 1 oz. Not cheap. Tatcha claims this gives you “glass skin” in one bottle. I call it a gamble.
1. **Squalane → C15-19 Alkane** – A swap from skin-identical oil to a lab-made emollient.
2. **Same price** – No discount for the cheaper ingredient list. Bold.
3. **Texture shift** – Formerly weightless. Now it’s a film.
🧴 **What’s Really Inside**
Hadalabo’s clone squad meets a rice ferment. The hero is still Japanese wild rose—it’s fine for surface glow. But the base oil is where it went wrong.
– Hime-Camelia Oil: Lightweight, smells expensive, doesn’t do heavy lifting
– Japanese Wild Rose: Gives that instant “I slept 9 hours” look for about 20 minutes
– Glycerin: The real MVP here. Doing the heavy hydration work
– Dimethicone: The reason it feels silky—and the reason it pills under sunscreen
📉 **The Wear Test**
First pump: smells like a spa. Spreads like pudding. Takes a full 45 seconds to absorb. My forehead looked dewy—my nose looked greasy. Not the same.
Week two: my cheeks broke out. Tiny closed comedones. My derm confirmed—the synthetic alkane is more comedogenic for some skin. Old version? Never happened.
💡 **One Thing** – Apply to damp skin only. Pat don’t rub. If you rub, it pills. If you pat, you get 70% of the old magic.
💬 **Does It Actually Work?**
Skin looks plump in the morning. Texture? Rougher by day three. If you had reactive skin to the old formula, the new one might be worse.
✅ **Buy if** – you have dry, non-reactive skin and want instant glow for events
⏭️ **Skip if** – you’re combo/oily or prone to milia
💰 **Worth it?** – Not at full price. Try the mini first. I wouldn’t repurchase.
🔁 **Final Nail**
Old formula was a 9/10. New one is a 6.5. They fixed nothing that was broken and broke what wasn’t.
🔴 **5.8/10** – A downgrade you can feel
🛍️ **Where to Buy** – Sephora. Get the travel size ($28) before committing to the full bottle.