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Bienfaits de l'algue rouge sur la peau.

The benefits of red seaweed for your skin.

Red seaweed, scientific name Rhodophyta, is a multicellular marine algae. In terms of skin care, this ingredient is known for its plumping and hydrating properties.

Published November 29, 2022, by Maylis, Chemical Engineer, — 5 min read

Red seaweed, a natural source of carrageenan.

Red seaweed or Rodophyta is a type of marine algae generally found in Europe (the Atlantic Ocean, the Channel, the North Sea). Carrageenan, a sulfated polysaccharide, is extracted from red seaweed, and used to thicken formulas and give them a gel-like consistency.

This biopolymer is widely used in both cosmetics and the food industry. Traditionally extracted from the species Chondrus crispus (also known as Irish moss), carrageenan now mainly comes from the species Kappaphycus alvarezii, Eucheuma denticulatum or even Furcellaria lumbricalis, which are very common in Scandinavian waters.

The benefits of red seaweed in skincare.

First of all, the carrageenan extracted from red seaweed has humectant properties, allowing it to retain water in the upper layers of the skin, and decreasing transepidermal water loss. This natural physiological phenomenon is due to the difference in osmotic pressure between the different layers of the skin as well as the air that surrounds us. To make up for this loss, hydration is essential for all skin types. Moisturizing your skin with a product enriched with carrageenan helps to avoid that pulling sensation caused by dryness, and dehydration wrinkles.

Carrageenan is able to stimulate the production of hyaluronic acid in the epidermis. As a reminder, hyaluronic acid is a biomolecule which maintains skin hydration and gives it that plumped, healthy look. As time goes by, our skin produces less, and of worse quality. With every decade, we lose around 6% of our hyaluronic acid.

This drastic drop leads to atrophy of the fatty pockets located deep in the dermis, causing fine lines and wrinkles on the surface of the skin. Even if hyaluronic acid is present in higher volume in the dermis, its production level is higher in the epidermis than in the dermis. So, by stimulating epidermal production, carrageenan allows us to maintain plumped skin for as long as possible.

Red seaweed also helps to limit imperfections on the skin’s surface. Studies have shown carrageenan’s antibacterial action against Staphylococcus epidermidis and Enterococcus faecalis, two microorganisms responsible for acne and its associated inflammation issues.

Finally, red seaweed extract helps to stimulate ceramide production which tightens the epidermis and limits transepidermal water loss. As a reminder, ceramides are lipids organized as dense and structured lamellae which form the intercellular cement.

Typology’s plumping serum with red seaweed extract.

Our plumping serum contains both red seaweed extract and polyglutamic acid to boost your skin’s hydration. Red seaweed extract is derived from an oligofurcellarane obtained by depolymerisation of a sulfated furcellarane (galactose and anhydrogalactose) from the species Furcellaria lumbricalis.

After this depolymerization, the oligofurcellane is rehydrated with a solution rich in marine salts. This addition of marine trace elements, in particular potassium, induces a reorganisation of the polymer into a double helix, which gives it excellent hygroscopic properties.

Sources :

  • KANAAN H. M. & al. Anticoagulant and antibacterial activities of polysaccharides of red algae Corallina collected from Lebanese coast. Journal of Applied Pharmaceutical Science (2014).

  • HUANG N. & al. Potential use of seaweed bioactive compounds in skincare: A Review. Marine Drugs (2019).

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