What it is
Kappaphycus alvarezii extract is obtained from a red seaweed that is a natural source of carrageenan-type polysaccharides. In cosmetics it conditions the skin, helps attract and hold moisture, and can form a light, smoothing film on the surface. In sunscreens it often serves as a supporting ingredient that improves skin feel and hydration.
Safety & warnings
This algae extract is generally well tolerated at cosmetic use levels, with a low likelihood of irritation or sensitization. It is not typically considered comedogenic.
Origin & sourcing
It is a natural extract derived from the red marine alga Kappaphycus alvarezii.
Questions everyone asks
What is Kappaphycus alvarezii extract?
It is an extract from a red seaweed that provides polysaccharides used to condition the skin and help it hold moisture.
What does it do in sunscreen?
It supports hydration and can form a light smoothing film, improving how the product feels on the skin.