Ascophyllum Nodosum Extract

Ascophyllum nodosum is a species of brown seaweed (macroalga) found in cold Atlantic waters. The extract is rich in polysaccharides, carotenoids, and lipids—compounds that have been studied for their potential effects on skin health and resilience.In skincare, ascophyllum nodosum extract functions primarily as a skin conditioning agent. It works to support the skin's moisture content and help maintain a healthy skin barrier, rather than treating a specific concern.

Ascophyllum nodosum extract contains sulphated polysaccharides that interact with skin in two main ways. First, they form a conditioning film on the skin surface, helping to seal in moisture and improve the feel and appearance of skin texture. Second, these polysaccharides may interact with the skin's natural moisturising factor to enhance overall hydration.The extract's carotenoid content also contributes antioxidant activity, helping to neutralise free radicals that can compromise skin health, though this is a secondary benefit.

Ascophyllum nodosum extract is typically found in moisturisers, serums, and treatments rather than as a single-ingredient product. It works well alongside other hydrating and conditioning ingredients, and is suitable for daily use. There is no need to layer it with other marine or seaweed extracts, as this may be redundant.

Ascophyllum nodosum extract is generally well-tolerated and considered safe for cosmetic use. Those with known sensitivity to iodine or shellfish should be cautious, as seaweed can contain iodine.