Agar

Agar is a gelatinous polysaccharide extracted from red and brown seaweed. In skincare, it functions primarily as a thickening and binding agent, helping to create the desired texture and consistency of products whilst maintaining stability during storage and use.Rather than delivering active benefits to the skin itself, agar works behind the scenes in formulation. It allows skincare makers to achieve the right viscosity and texture, making products easier to apply and use effectively. It appears in approximately 0.4% of skincare products on the market.

Agar absorbs water and forms a gel-like matrix within a product. This increases viscosity, meaning the product becomes thicker and more stable. The seaweed-derived polymer holds other ingredients in suspension, preventing them from settling or separating.From a user perspective, this means your product maintains an even consistency from first use to last, and applies smoothly across the skin without clumping or uneven distribution.

Agar is an ingredient you won't notice working — that's the point. Simply use your agar-containing product as directed. Since it primarily affects texture and stability, the key is ensuring the product remains well-mixed before each application. If a product has separated slightly during storage, gentle shaking should redistribute the agar gel matrix.

Agar is well-tolerated in topical skincare formulations and is derived from a natural source. As with any ingredient, individuals with seaweed sensitivities should verify product composition before use.