Description

Oenothera biennis oil, commonly known as evening primrose oil, is extracted from the seeds of the Oenothera biennis plant, which belongs to the Onagraceae family. This oil is used in cosmetics and personal care products for its nourishing, hydrating, and anti-inflammatory properties.

Chemical Composition and Structure

Oenothera biennis oil contains a variety of bioactive compounds, including:

Gamma-Linolenic Acid (GLA): This essential fatty acid is a major component of the oil and contributes to its anti-inflammatory and skin-conditioning properties.
Linoleic Acid: An essential fatty acid that helps maintain the skin’s barrier function and moisture balance.
Oleic Acid: This monounsaturated fatty acid supports skin hydration and elasticity.
Vitamin E: A powerful antioxidant that helps protect the skin from oxidative stress and damage.
Phytosterols: Plant-derived compounds that help reinforce the skin barrier and reduce inflammation.
The chemical structure of Oenothera biennis oil is characterized by a high concentration of essential fatty acids, particularly gamma-linolenic acid, which contributes to its therapeutic benefits.

Physical Properties

Oenothera biennis oil is typically a light yellow to amber liquid with a mild, nutty aroma. It is relatively viscous and has a smooth texture. The oil is soluble in other oils and solvents but not in water.

Production Process

The production process for Oenothera biennis oil involves several key steps:

Harvesting: Seeds of the Oenothera biennis plant are collected once they are fully mature. These seeds are rich in essential fatty acids and other beneficial compounds.

Preparation: The harvested seeds are cleaned and prepared for oil extraction. This involves removing any impurities and preparing the seeds for processing.

Extraction:

Cold Pressing: The seeds are mechanically pressed to extract the oil without the use of heat. This method preserves the oil’s natural properties and ensures high-quality extraction.
Solvent Extraction: In some cases, solvents such as hexane may be used to extract the oil from the seeds. This method can be used to increase yield but may require further purification.
Refinement: The extracted oil may undergo refinement to remove any residual solvents, impurities, and unwanted compounds. This process includes filtering and deodorizing.

Formulation: The refined oil is then incorporated into various cosmetic and personal care formulations, such as creams, lotions, serums, and oils. It is blended with other ingredients to enhance its benefits.

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

Storage: The oil is stored in airtight, opaque containers to protect it from light, heat, and air, which can degrade its quality. Proper storage ensures the oil remains stable and effective over time.

Applications

Medical: Oenothera biennis oil is used in nutraceutical products for its anti-inflammatory and health-promoting properties. It may support cardiovascular health and skin conditions when consumed as a dietary supplement.

Cosmetic: In cosmetics, Oenothera biennis oil is valued for its nourishing, hydrating, and anti-inflammatory properties. It is used in products such as creams, lotions, serums, and oils to improve skin hydration, elasticity, and overall appearance.

Other: The oil can also be included in other personal care products and therapeutic applications, such as massage oils and treatments for dry or irritated skin.

Environmental and Safety Considerations

Oenothera biennis oil 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. Environmentally, the use of sustainable harvesting and extraction practices helps reduce the ecological impact of production, supporting more environmentally friendly practices.

INCI


Skin conditioning agent - Emollient. Emollients have the characteristic of enhancing the skin barrier through a source of exogenous lipids that adhere to the skin, improving barrier properties by filling gaps in intercorneocyte clusters to improve hydration while protecting against inflammation. In practice, they have the ability to create a barrier that prevents transepidermal water loss. Emollients are described as degreasing or refreshing additives that improve the lipid content of the upper layers of the skin by preventing degreasing and drying of the skin. The problem with emollients is that many have a strong lipophilic character and are identified as occlusive ingredients; they are oily and fatty materials that remain on the skin surface and reduce transepidermal water loss. In cosmetics, emollients and moisturisers are often considered synonymous with humectants and occlusives.
Synonyms:

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