So Biotherm redid their cult Blue Therapy Serum-In-Oil. And fans are *pissed*. The old version was this weird, gorgeous, water-meets-oil hybrid that made your skin feel like a glazed donut. The new one? They swapped out the microbiome-friendly sugar complex for more traditional oils. It’s less weird now. Which is a shame — weird was the point. The texture went from “liquid silk” to “nice face oil.”
⚖️ **What You’re Actually Buying**
It’s still a serum-oil hybrid, $79 for 30ml. The claim: “anti-aging regeneration” via their new Life Plankton micro-peptide complex. I bought it because the old one made my dehydrated 30-something skin look plump after one night. Here’s what’s new:
1. **Life Plankton Micro-Peptide** — Their fancy probiotic extract, now with peptides. Claims to rebuild collagen.
2. **Refined Camellia Oil** — Lighter than the old macadamia. Less greasy, but also less… indulgent.
3. **Niacinamide (added)** — Brightening. A safe crowd-pleaser. Boring but effective.
🧴 **The Ingredient Shuffle**
Hero is still Life Plankton — that’s the thermal plankton extract they patented. It’s calming and reparative. But they swapped the old sugar complex (which fed your skin’s microbiome) for more straight oils and niacinamide. Smart for texture, dumb for uniqueness.
– **Life Plankton**: Repairs moisture barrier, calms redness
– **Niacinamide**: Brightens, shrinks pores, reduces oil
– **Camellia Oil**: Lightweight hydration, antioxidant
– **Glycerin**: Classic humectant, nothing fancy
📉 **The Texture Tells the Truth**
First pump — it’s thinner. Almost watery. Absorbs in 8 seconds flat. No greasy residue. My skin felt hydrated instantly, but not *fed*. That’s the difference. The old version sat on top for a minute, then sank in like a hug. This one disappears immediately — almost too fast. By week 2, my skin looked smoother, but the plumpness I loved was gone. It felt like a good moisturizer, not a transformative serum.
💡 **One Thing**: Apply to *damp* skin. It absorbs too fast dry. Damp skin gives it 10 extra seconds to actually work.
📈 **The Real Results**
After 4 weeks: fine lines around my eyes looked softer. Pores on my nose looked smaller. But that “I just drank 3 liters of water” glow? MIA. My skin felt stable, not spectacular.
– ✅ **Buy if**: You have oily or combo skin and want a lightweight anti-aging oil
– ⏭️ **Skip if**: You loved the original’s bouncy, plumping texture
– 💰 **Worth it?** Only if you never tried the old one. For newbies, it’s a solid 7/10 serum. For veterans, a downgrade.
💬 **Final Call**
It’s a good serum dressed in a cult-favorite bottle. But the magic is diluted. If you’re new — fine. If you’re nostalgic — skip it.
⭐ **6.5/10 — Good, not great anymore**
💡 **Where to Buy**: Sephora — grab a mini first. Don’t blind buy the full size.