Oenothera Biennis Sprout Extract — INCI reference

What it is

Oenothera Biennis Sprout Extract is derived from the sprouts of the common evening primrose (Oenothera biennis), a biennial flowering plant native to North America. The extract is rich in polyphenolic acids (gallic acid and ellagic acid) and flavonoid glycosides (luteolin 7-O-glucuronide and quercetin 3-O-glucuronide), which contribute to its antioxidant and skin-conditioning properties. In vitro and in vivo studies show that the extract inhibits matrix metalloproteinases (MMP-1, MMP-2, and MMP-9), which are enzymes responsible for collagen degradation, while simultaneously stimulating type I collagen synthesis and increasing hyaluronic acid production. These actions help reduce the appearance of fine lines and wrinkles and support skin barrier hydration. The extract also upregulates aquaporin 3 (AQP3) and hyaluronic acid synthase 2 (HAS2) gene expression, further supporting moisture retention.

Safety & warnings

Evening primrose extracts are generally considered well tolerated at typical cosmetic use levels. In animal studies, oral administration of the sprout extract at up to 200 mg/kg for 14 weeks produced no abnormal clinical signs, mortality, or significant body weight changes. The plant belongs to the Onagraceae family; no widespread contact sensitization is reported for the sprout extract in the published literature. Individuals with known hypersensitivity to evening primrose or Onagraceae plants should use caution.

Origin & sourcing

Extracted from the sprouts (seedlings) of Oenothera biennis (common evening primrose), a biennial plant native to eastern and central North America and naturalized widely in temperate regions worldwide. The extract is typically prepared by macerating dried sprout material in 50% aqueous ethanol with stirring at room temperature for 24 hours, followed by filtration, solvent evaporation, and spray or freeze drying to yield a dry powder or concentrated liquid extract.

History

Evening primrose (Oenothera biennis) has been used as food and traditional medicine by Indigenous North Americans for centuries. The plant was introduced to European botanical gardens in the early 17th century. Modern interest in evening primrose as a cosmetic and pharmaceutical ingredient grew substantially in the late 20th century, driven by the discovery of gamma-linolenic acid (GLA) in the seed oil. Research on the sprout-specific extract for skin benefits, particularly anti-wrinkle and moisturizing activity, emerged in peer-reviewed literature in the 2010s–2020s.

Questions everyone asks

What makes evening primrose sprout extract different from evening primrose oil?

Evening primrose oil is cold-pressed from the seeds and is valued primarily for its gamma-linolenic acid (GLA) content, which makes it useful as an emollient and supplement. The sprout extract, by contrast, is a water-alcohol extract of the young seedlings and is rich in polyphenolic acids and flavo

How does Oenothera Biennis Sprout Extract reduce wrinkles?

The extract inhibits matrix metalloproteinases (MMP-1, MMP-2, and MMP-9), enzymes that degrade collagen in the skin. It also stimulates type I collagen production in fibroblasts. Together, these actions help maintain structural skin proteins and reduce the formation and depth of wrinkles over time.

Does the extract help with skin hydration?

Yes. Research shows the extract increases hyaluronic acid levels in the skin and upregulates expression of HAS2 (hyaluronic acid synthase 2) and AQP3 (aquaporin 3), a water-channel protein. These effects contribute to improved skin moisture retention and reduced transepidermal water loss.

Is Oenothera Biennis Sprout Extract safe for sensitive skin?

No widespread sensitization or irritation issues are reported in published research for this extract at cosmetic concentrations. However, persons with known allergies to evening primrose or related plants in the Onagraceae family should exercise caution and may wish to patch-test products containing

Sources & references

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