The Benefits of Algae in Skincare

In skincare, algae refers to extracts taken from organisms such as seaweed, kelp and spirulina.

Algae thrive in freshwater and saltwater environments and are naturally loaded with nutrients that are great for the health of your skin. For this reason, it’s thought that their resilience in harsh conditions is what makes them so useful in skincare formulations (1).

Why algae extracts are popular in skincare

Algae is packed with minerals and antioxidants, making it a bit of an all-rounder when it comes to how it makes skin look and feel (2).

Antioxidant defence: Oxidative stress can lead to visible ageing and uneven texture. Compounds in algae help to combat this.

Skin hydration: Functions as a natural humectant, helping skin draw in water and hold onto it.

Anti-ageing: Antioxidants and amino acids help soften the look of fine lines and wrinkles, while supporting elasticity and the function of collagen in the skin. This includes seaweed, kelp, and microalgae.

Soothing action: Anti-inflammatory properties help ease redness, irritation and sensitivity, including in acne-prone skin and cases of rosacea. Green and red algae extracts, in particular, help to calm sensitive skin, strengthen blood vessels, and potentially reduce angiogenesis (formation of new blood vessels).

Oil regulation: Supports balanced sebum production, helping keep pores clearer and congestion in check.

Tone refinement: Regular use can help reduce the appearance of dark spots and uneven skin tone/ pigmentation.

Environmental protection: Certain algae contain mycosporine-like amino acids that help absorb UV exposure and defend against daily environmental stress (3).

Common types of algae used

Different algae species are usually chosen for the different and varying roles they have in skincare (4):

Red algae: Valued for moisture retention, barrier support and brightening effects.

Brown algae / seaweed / kelp: Nutrient-dense and commonly used in smoothing and age-support formulas, with fucoxanthin contributing to its colour.

Blue-green algae (spirulina): Known for its purifying feel, antioxidant content and support for skin renewal.

Red winter algae: Often used in hair, lash and brow products for density and growth support.

Marine ectoine and seaweed extracts: Used to deeply hydrate, smooth visible ageing and reinforce the skin’s natural defences.

Who algae in skincare is best for (5):

Dry or dehydrated skin needing sustained moisture

Skin showing fine lines, wrinkles or loss of firmness

Oily or acne-prone skin requiring balance and calm

Sensitive skin prone to redness or irritation

Safety

Algae extracts are widely used and generally well tolerated across skin types. Always purchase from reputable brands and retailers to ensure the safety of your product.

Key takeaways

Algae appears in cleansers, serums, moisturisers, masks, eye creams and hair care. It layers easily into both morning and evening routines and works well alongside most active ingredients.