Is Circumference’s New Skin Barrier Serum Actually Clean?

Circumference’s new serum says “100% natural” on the front — and our lab found a synthetic preservative hiding in the ingredient list. It’s not the end of the world, but it *is* the exact kind of greenwashing that makes me want to throw the whole bottle at their marketing team.

The culprit? Sodium benzoate, a perfectly safe lab-made compound that keeps the formula from turning into a petri dish. Call it what it is — don’t hide behind a “natural” label like it’s a dirty word.

It’s $48 for 1 oz. The claim that hooked me: “Barrier repair in 14 days.” Bold. I’ve tried more expensive serums that did absolutely nothing but smell expensive.

Photo: Chalo Garcia / Unsplash

Look past the label and you’ve got a solid, boringly effective formula. No fairy dust, no unicorn tears — just the stuff that actually works.

• Ceramide NP: Repairs the glue between skin cells
• Panthenol: Soothes irritation better than most fancy oils
• Squalane: Hydrates without clogging — finally
• Tocopherol: Vitamin E that keeps the oils from going rancid

Photo: Harper Sunday / Unsplash

The texture is a gel-water hybrid — absorbs in 8 seconds flat, zero greasy film. I put it on right after cleansing and before moisturizer. It feels like nothing, which is honestly the point.

Week 2: my skin stopped flaking around my nose. That persistent tight feeling after washing my face? Gone. But it didn’t do jack for my fine lines — which they *didn’t* claim, so I’m not mad.

Photo: Masum Rahimi / Unsplash

Yes — my barrier is objectively stronger. No more stinging when I apply my vitamin C. But the “14-day” promise? More like 10 days of consistent use, and that was with perfect application.

Photo: Sonia Roselli / Unsplash

It’s a genuinely good serum hiding behind a marketing lie. Buy it for the formula, ignore the label, and you’ll be happy.