Ingredient guide
Alguronic Acid
alguronic acid
In short
Alguronic acid is a microalgae-derived polysaccharide that forms a hydrating, protective film on skin. It’s often used in premium formulas to support smoothness and barrier comfort.
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Works for
Hydration · Barrier
Best used
Anytime
What it is
Proprietary polysaccharide from rapidly-dividing microalgae (Solazyme); contains unique polyols and glucuronides; acts as a biosurfactant and film-forming humectant; in-vitro studies show activation of cell renewal pathways; primarily used in premium anti-aging hydration serums.
Where it sits
A watery layer. After cleansing, before anything heavier, ideally on slightly damp skin.
- Cleanse
- Tone
- Alguronic Acid
- Moisturise
- SPF
Also found as
Related
Where to find it
Options across the range, not a ranking. Run one through Lens and MIRU will tell you if it fits you.
Algenist Genius Liquid Collagen
Algenist GENIUS Ultimate Anti‑Aging Cream
Fit comes first: the Lens checks each product against your skin before any retailer link. We may earn a commission, at no cost to you. Picks are editorial, never paid.
Common questions
What does alguronic acid do for skin?
It helps increase hydration, supports the barrier, and can give skin a softer, more cushioned feel.
Is alguronic acid suitable for all skin types?
Most skin types tolerate it well, especially those looking for gentle hydration without heaviness.
Where is alguronic acid used in skincare?
It’s commonly found in high‑end serums and creams focused on hydration and visible skin smoothness.
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Personal guidance, not medical advice.