Ingredients  /  Algin  /  


Algin, also known as sodium alginate, is a large sugar molecule/polysaccharide that is used as a gelling agent in cosmetics, and is derived from brown seaweed. It is used in cosmetics for its hydrating and soothing properties, and in formulations as a binding and thickening agent. It is in the class of Algae Extract which also include ahnfeltia concinna extract, alaria esculenta extract, algae exopolysaccharides, alteromonas ferment extract, ascophyllum nodosum extract, asparagopsis armata extract, chlorella protothecoides, chlorella vulgaris extract, dunaliella salina (green algae) extract, hydrolyzed f-fucoidan, laminaria ochroleuca (kelp) extract, macrocystis pyrifera (kelp) extract, and marine extract.

What is Algin?

An extract from brown seaweed used as hydrating, soothing, and viscosity controlling agent.

What does Algin do?

In skincare products, it is used for its excellent water-binding properties to impart hydration and plumpness to the skin. In cosmetic product formulation, it is used as a thickening agent to improve the texture and viscosity of formulations.

Who is Algin good for?

If any of the following apply Algin might be a good option for you:

Dry and dehydrated skin

Fine Lines



Who should avoid Algin?

If any of the following apply it might be best to avoid Algin:

Related Allergy

Should you be using Algin?

Start your 2 minute skin quiz today and one of our aestheticians will create a personalised skincare routine for you!

Our favourites with Algin
Your personalised skincare routine in 3 simple steps
Tell us about your skin

Complete our quick quiz, then upload photos or book a video call (priced at £20 or £35)

We’ll personalise your routine

Our award-winning AI analyses your skin before your aesthetician creates your personalised routine

Begin your skin journey

Message your aesthetician with any questions and check-in as your skin changes for ongoing advice