Lithothamnion Calcareum Extract
INCI: LITHOTHAMNION CALCAREUM EXTRACT
Reviewed by Kate · Last updated 2 Jun 2026
A mineral-rich seaweed extract that conditions and supports skin texture
Best For Skin Types
All, Dry, Combination
Addresses
Usage Frequency
Daily
What Is Lithothamnion Calcareum Extract?
Lithothamnion calcareum extract comes from a species of red coralline algae (also called lithothamnium) found in cold ocean waters. The algae accumulates minerals including calcium, magnesium, and trace elements over time, making the extract mineral-dense.
In skincare, it functions as a skin conditioner. The extract is thought to work by delivering these minerals to the skin surface, potentially helping to maintain hydration and support the skin's natural structure. It is used in relatively small concentrations in formulations.
How It Works
The extract delivers a range of minerals directly to the skin. Calcium and magnesium are thought to play a role in maintaining skin barrier function and cellular regulation, though the specific mechanisms in topical application are not extensively documented.
By coating the skin and providing these minerals, the ingredient may help improve hydration retention and support the skin's natural conditioning processes, contributing to a more supple appearance.
Clinical Evidence & References
Published clinical studies specifically evaluating lithothamnion calcareum extract in skincare are limited. Most evidence comes from ingredient supplier data and small-scale cosmetic efficacy assessments rather than large randomised controlled trials.
The ingredient is well-established in marine skincare formulations, and anecdotal use suggests good tolerance and a mild conditioning effect. However, robust independent research on its efficacy compared to other conditioning agents would strengthen the evidence base.
How to Use
This ingredient is typically found in serums, moisturisers, and masks at low concentrations. Since it is a conditioning agent rather than an active treatment, it is suitable for daily use as part of a regular skincare routine. Apply to clean skin before heavier creams or oils to allow absorption.
Safety & Precautions
Frequently Asked Questions
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