Schizothrix Calcicola Extract: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 30, 2025
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We verify all information on this page using publicly available nomenclature standards from The Personal Care Products Council (PCPC), the European Commission's CosIng database and documentation provided directly by ingredient manufacturers. Our analysis is based on technical data from these sources to ensure accuracy and reliability.

What Is Schizothrix Calcicola Extract?

Schizothrix Calcicola Extract comes from the freshwater blue-green alga Schizothrix calcicola, a member of the Schizotrichaceae family. Like other algae it is naturally rich in proteins, polysaccharides, minerals, vitamins and protective pigments. These nutrients help the plant survive harsh sunlight and changing water conditions, qualities that make its extract interesting for skin care.

Researchers began looking at microalgae for beauty products in the 1990s when brands wanted more plant based actives. As the technology for controlled algae farming improved Schizothrix calcicola became a sustainable option. Today the alga is cultivated in closed tanks or clean outdoor ponds to avoid contamination. After harvesting, the biomass is filtered, washed and gently dried. The dried material is then extracted with water or a mild solvent to pull out the skin friendly compounds. The liquid extract is clarified, concentrated and preserved, yielding a stable ingredient ready for cosmetic labs.

Thanks to its conditioning profile Schizothrix Calcicola Extract pops up in moisturizers, anti-aging lotions, soothing masks, after-sun gels, eye creams and even some hydrating makeup primers. Formulators like it because it mixes easily with water based phases and adds a plant derived story to a formula.

Schizothrix Calcicola Extract’s Cosmetic Benefits/Uses

In skin care formulas Schizothrix Calcicola Extract has one main job: skin conditioning. It helps keep the surface of the skin soft, smooth and healthy looking by supplying lightweight moisture and supportive nutrients. Over time regular use can improve the feel of dry or rough areas and support a more balanced complexion.

Who Can Use Schizothrix Calcicola Extract

Schizothrix Calcicola Extract is gentle enough for most skin types. It suits normal, dry, oily and combination skin because it gives light hydration without leaving a heavy film. Sensitive skin users also tend to tolerate it well since the extract is not known to be harsh or stripping.

The ingredient is sourced from microalgae and processed without animal inputs which makes it suitable for vegans and vegetarians.

No research points to issues for women who are pregnant or breastfeeding when this extract is applied topically. Still, this is not medical advice and anyone expecting or nursing should check with a healthcare professional before introducing new products.

The extract does not make skin more prone to sunburn so it is not considered photosensitizing. Normal sun care practices are still recommended.

Potential Side Effects/Adverse Reactions

Reactions to Schizothrix Calcicola Extract differ from person to person. The points below cover potential issues though most users will not experience them when the ingredient is properly formulated and preserved.

  • Allergic response – rare redness, itching or small bumps in those allergic to algae or marine actives
  • Stinging on compromised skin – mild tingling possible if applied to freshly exfoliated or broken skin
  • Preservative sensitivity – irritation that stems from the preservative system used in the final product rather than the extract itself
  • Contamination risk – products made with poorly processed algae can harbor impurities leading to irritation or infection

If any discomfort or noticeable reaction occurs stop use and consult a healthcare professional or dermatologist.

Comedogenic Rating

Rating: 1/5

Schizothrix Calcicola Extract is primarily water based and made up of light proteins, sugars and minerals rather than heavy oils or waxes, so it rarely blocks pores. Its thin hydrating film rinses away easily which keeps the clogging risk low.

Most acne prone users can apply products containing this extract without extra concern.

Remember that the finished formula counts. If the extract sits in a cream loaded with rich butters the overall pore clogging potential can still rise.

Summary

Schizothrix Calcicola Extract conditions skin by delivering quick lightweight moisture, smoothing rough spots and helping the complexion stay balanced through its mix of hydrating polysaccharides, amino acids and trace minerals. These nutrients pull in water, form a breathable protective layer and give tired skin gentle support.

While not a household name it has a steady niche appeal for brands that want sustainable microalgae actives with a mild profile.

Safety data show a very low chance of irritation or allergy, yet every skin is unique so patch testing any new product that contains Schizothrix Calcicola Extract is a smart precaution.

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