One ingredient, taken seriously. This Korean serum from iUNIK is 400,000ppm beta-glucan — a polysaccharide from mushroom yeast that holds water on the skin and calms it at the same time.

The serum people reach for when their barrier is wrecked or when nothing else is holding moisture. Fragrance-free, vegan. 50ml.

• 400,000ppm Beta-Glucan — a very high concentration of a polysaccharide that forms a moisture-holding film on the skin's surface. Unlike most humectants, it also soothes and supports barrier resilience.
• Glycerin + Sodium PCA — two of the most reliable humectants there are. Sodium PCA occurs naturally in your skin's own moisturizing factor, so it works with what's already there.
• Adenosine — a firming and fine-line active, earning its place even in a ten-ingredient formula.
• Only Ten Ingredients — deliberately minimal. Nothing to react to, nothing to interact badly with the rest of your routine, and it layers under anything without pilling.
• Good Alongside Retinol — reviewers use it to keep the barrier intact while running actives. This is where it does its best work.
• Non-Comedogenic — one reviewer with acne-prone skin says it's the rare hydrating product that doesn't break her out.

More from Olive Kollection
Browse our iUNIK collection or find more for barrier repair.

Authentic Korean skincare at Olive Kollection since 2018 — free US shipping on orders $40+.