Description

Oenothera biennis flower, leaf, and stem extract, also known as evening primrose extract, is derived from the plant Oenothera biennis, a member of the Onagraceae family. This extract is used in cosmetics and personal care products for its antioxidant, anti-inflammatory, and regenerative properties.

Chemical Composition and Structure

Oenothera biennis flower, leaf, and stem extract contains several bioactive compounds, including:

Gamma-Linolenic Acid (GLA): This essential fatty acid, primarily present in the seeds but also in smaller quantities in other plant tissues, contributes to the anti-inflammatory and skin-conditioning properties of the extract.
Linoleic Acid: An essential fatty acid that supports skin barrier function and maintains water balance.
Flavonoids: Found in the flowers and leaves, flavonoids have antioxidant and anti-inflammatory effects.
Tannins: Present in the leaves and flowers, tannins offer astringent and protective properties for the skin.
Saponins: Compounds found in various plant tissues that contribute to the extract’s cleansing and soothing properties.
The chemical structure of the extract is characterized by the presence of essential fatty acids, flavonoids, and other bioactive compounds that contribute to its therapeutic benefits.

Physical Properties

Oenothera biennis flower, leaf, and stem extract is typically a yellow or amber-colored liquid with a delicate, herbaceous aroma. It has a variable viscosity and may differ slightly in color and consistency depending on the extraction method and concentration.

Production Process

The production process of Oenothera biennis flower, leaf, and stem extract involves the following steps:

Harvesting: Flowers, leaves, and stems of the Oenothera biennis plant are harvested during the growing season. These plant parts are selected for their active ingredient content.

Preparation: The harvested plant material is cleaned and prepared for extraction, removing impurities and debris.

Extraction:

Solvent Extraction: Plant materials are immersed in solvents such as ethanol or methanol to dissolve the bioactive compounds. The resulting solution is then filtered to remove solids.
Cold Extraction: A cold extraction method may also be used to preserve heat-sensitive active compounds.
Concentration and Purification: The extract is concentrated to achieve a higher concentration of active ingredients and purified to remove impurities and residual solvents.

Formulation: The purified extract is incorporated into various cosmetic formulations such as creams, lotions, serums, and masks. It is blended with other ingredients to optimize the final product’s benefits.

Quality Control: The final product undergoes rigorous quality control testing to ensure it meets safety, efficacy, and performance standards. This includes checks for purity, stability, and regulatory compliance.

Storage: The extract is stored in airtight, light-resistant containers to maintain its stability and effectiveness over time.

Applications

Medical: Oenothera biennis flower, leaf, and stem extract can be used in nutraceutical products for its antioxidant and anti-inflammatory properties. It may support skin health and improve inflammatory conditions.

Cosmetics: In cosmetics, the extract is valued for its antioxidant, anti-inflammatory, and regenerative properties. It is used in products such as creams, lotions, serums, and masks to enhance skin appearance and reduce inflammation.

Other: The extract may also be included in other personal care products and additional therapeutic applications.

Environmental and Safety Considerations

Oenothera biennis flower, leaf, and stem extract is generally considered safe for use in cosmetics and nutraceuticals when used according to recommended guidelines. It is a natural ingredient with a low risk of irritation or allergic reactions. Sustainable harvesting practices and eco-friendly extraction methods help to minimize the environmental impact of production.

INCI


Skin conditioning agent. It is the mainstay of topical skin treatment as it has the function of restoring, increasing or improving skin tolerance to external factors, including melanocyte tolerance. The most important function of the conditioning agent is to prevent skin dehydration, but the subject is rather complex and involves emollients and humectants that can be added in the formulation.
Synonyms:

CAS: 90028-66-3 EC number 289-859-2