Skin Conditioning

Euglena Gracilis Extract

INCI: EUGLENA GRACILIS EXTRACT

Reviewed by Emma · Last updated 2 Jun 2026

A microalgae extract rich in polysaccharides that may support skin hydration and resilience

Best For Skin Types

All, Dry, Sensitive, Mature

Addresses

Dryness, Sensitivity, Barrier repair

Usage Frequency

Daily

What Is Euglena Gracilis Extract?

Euglena gracilis extract is derived from a single-celled freshwater microalga. The extract contains paramylon, a naturally occurring β-1,3-glucan polysaccharide, along with other bioactive compounds. In skincare formulations, it functions primarily as a skin conditioning agent.

The microalga accumulates paramylon as an energy reserve, which appears to be the component responsible for most of the extract's reported biological activity. This makes euglena gracilis extract a renewable, plant-derived ingredient suitable for formulators seeking natural alternatives to synthetic conditioning agents.

How It Works

The primary active component, paramylon, appears to work through multiple mechanisms. Research indicates it can interact with cellular signalling pathways — notably activating SIRT1, a protein involved in cellular stress response and longevity. This activation may help epidermal cells maintain their protective functions and respond more robustly to environmental challenges.

Additionally, paramylon exhibits antimicrobial and anti-inflammatory properties in laboratory settings, though the extent to which these translate to meaningful benefits in topical skincare remains an area requiring further investigation.

Clinical Evidence & References

Laboratory studies demonstrate that euglena gracilis extract and its isolated paramylon component can facilitate wound healing in animal models and activate cellular pathways associated with skin health. In particular, research shows it can increase SIRT1 expression in cell cultures and reduce excessive inflammatory markers during wound healing.

However, evidence in human skin is limited. Most existing data comes from in vitro studies or animal models rather than clinical trials on human volunteers. This means the ingredient's real-world efficacy in topical skincare products remains uncertain, though early indicators are encouraging enough to warrant its inclusion in some formulations.

How to Use

Euglena gracilis extract is typically incorporated into serums, moisturisers, and treatment products rather than used as a standalone ingredient. Apply to clean skin as directed by the specific product formulation. It pairs well with other hydrating and conditioning agents, though no specific interactions with other actives have been widely documented.

Safety & Precautions

Euglena gracilis extract is generally well-tolerated and considered safe for topical use. No significant adverse effects have been reported in available research, though patch testing is advisable for those with known sensitivity to algae-derived ingredients.

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