Best For Skin Types
All, Dry, Combination, Sensitive
Addresses
Usage Frequency
Daily
What Is Calothrix Crustacea?
Calothrix Crustacea is a cyanobacterium (blue-green algae) sourced from marine environments. In skincare, it functions primarily as a humectant and skin conditioning agent, working to improve the skin's moisture-binding capacity.
As a natural extract, it contains polysaccharides and other water-binding compounds that help the skin retain hydration. It is typically used in concentrations that support overall skin hydration without disrupting the skin barrier.
How It Works
Calothrix Crustacea works as a humectant by drawing water from deeper skin layers and the environment into the epidermis. Its polysaccharide content forms a moisture-binding matrix on the skin surface, helping to reduce transepidermal water loss.
This mechanism is particularly useful in formulations designed to improve hydration without occlusion, making it suitable for layering with other actives or for use under moisturisers.
Clinical Evidence & References
Research specifically on Calothrix Crustacea in skincare is limited. The ingredient has been used in cosmetic formulations based on its established humectant properties and traditional use in marine-derived skincare, but robust clinical studies in humans are not widely published.
Evidence for related marine polysaccharides suggests similar ingredients can improve skin hydration and texture when used consistently. More targeted research on this specific extract would help clarify its efficacy profile.
How to Use
Calothrix Crustacea is typically incorporated into serums, hydrating toners, and lightweight moisturisers. For best results, apply to damp skin to maximise the humectant effect, then seal with an occlusive moisturiser if your skin is very dry. It can be used daily and layers well with other hydrating or active ingredients.
Safety & Precautions
Frequently Asked Questions
From the Clinic
Not sure what your skin actually needs?
Two minutes, a few questions, and we’ll point you at what matters — no guesswork.
Take the skin quizRelated Ingredients
C12-13 Alkyl Glyceryl Hydrolyzed Hyaluronate
A lightweight humectant that delivers hydration without heaviness
Calcium PCA
Key component of skin’s natural moisturising factor As a skin care ingredient, this mineral electrolyte helps replenish skin’s barrier
Calophyllum Tacamahaca Seed Extract
A plant-derived humectant that draws moisture into skin and supports hydration
Camellia Euryoides Leaf Extract
A plant extract that conditions and hydrates the skin through natural emollient properties
Camellia Sinensis Seed Extract
A plant extract that may help regulate sebum production and reduce stress-related skin inflammation
Cannabis Sativa Seed/Stem Oil
A plant-derived oil that conditions and hydrates the skin barrier
Learn More About Skincare Ingredients
Explore our comprehensive ingredient glossary to understand what's in your products.
Browse All IngredientsShop Our Products
Find professional skincare solutions at Skintique.