Evening Primrose Oil (Oenothera biennis)

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Evening Primrose Oil

月见草油 (Yuè Jiàn Cǎo Yóu) · Oenothera biennis

Rich in gamma-linolenic acid (GLA), an omega-6 fatty acid. Used for PMS symptoms, skin conditions like eczema, and breast pain. Popular in women's health protocols.

Evidence Score
7.5/10
Good Evidence
Safety
Safe for most adults

Good For

Key Benefits

May support hormonal balance

Traditionally used for menstrual health and reproductive wellness

May support skin health and appearance

Traditionally used to nourish the complexion and promote radiance

How to Take

Typical dose: Follow product label directions. Typical range: 500-1500mg daily as standardized extract
Forms: capsule, powder, tea/decoction, topical cream
Timing: Take with food unless otherwise directed. Allow 2-4 weeks for full effects with tonic herbs
Start with lower doses and increase gradually. Quality and standardization vary between brands.

Safety & Interactions

Possible Side Effects

  • Generally well tolerated at recommended doses
  • Mild digestive upset possible in sensitive individuals

Do Not Use If

  • Known allergy to this plant or related species
  • Consult healthcare provider if pregnant or nursing

Drug Interactions

  • No major drug interactions documented at standard doses
  • Inform your doctor of all supplements you take

Traditional Use

In Traditional Chinese Medicine, 月见草油 (Yuè Jiàn Cǎo Yóu) has been used for centuries. It nourishes blood and supports the liver's role in regulating menstruation according to TCM theory. It nourishes yin and blood to promote a healthy, radiant complexion in TCM beauty formulations.

Modern Research

Moderate research exists for this herb, including some clinical trials and substantial preclinical data. While not as extensively studied as top-tier herbs, the evidence supports several traditional uses. More human trials would strengthen the evidence base.

View all studies on PubMed for Oenothera biennis

Where to Buy

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