So this ISDIN serum went viral last summer because people claimed it literally fills in lines instantly — think injectable-lite, but in a dropper bottle. I called bullshit.
The instant effect is real. But here’s the thing nobody talks about: that “filler” effect is just glycerin swelling your top layer of skin. The collagen rebuild takes weeks. I wanted to know if the long game actually paid off.
It’s a milky, almost watery serum with a strange blue tint — like someone diluted a Gatorade. $69 for 30ml. The claim: visible firming in 28 days, backed by clinical testing.
Texture
Thinner than water, thicker than toner — absorbs in literally 8 seconds flat.
Scent
None. Zero. Like they forgot to add fragrance — which I actually prefer now.
Packaging
Blue glass dropper that looks expensive on your shelf but is a pain when you’re rushing.
Photo: Poko Skincare / Unsplash
The hero is a synthetic peptide complex plus hyaluronic acid — the usual suspects. But the surprise? They added a marine collagen fragment small enough to actually penetrate. Most collagen serums are a lie. This one might not be.
- Palmitoyl Tripeptide-1: Signals fibroblasts to make new collagen
- Hydrolyzed Marine Collagen: Small enough to absorb, firming after 2 weeks
- Sodium Hyaluronate: Plumps instantly, lasts about 6 hours
- Glycerin: The real MVP for that ‘filler’ look
Photo: Laura Jaeger / Unsplash
First pump felt like nothing — it vanished into my skin before I could spread it. I actually reapplied because I thought I missed. By day 3, my morning puffiness was noticeably less.
Week 2-3: my nasolabial folds looked softer, not gone, but softer. What surprised me? It didn’t break me out — most peptide serums give me tiny whiteheads. This one didn’t.
Photo: Brayden Prato / Unsplash
After 30 days: my skin is firmer — not “lifted” like a facelift, but the sag under my jawline tightened by maybe 15%. The instant plumping still happens every time I apply, which is the real trick. Lines didn’t disappear, but they looked shallower in good lighting.
It’s a good serum that does exactly what it promises — just don’t expect to look 25 again. The viral hype is 60% deserved, 40% marketing fluff.