🌿Western Herbalism

Oregon Grape

Mahonia aquifolium

About Oregon Grape

Oregon Grape (Mahonia aquifolium) is a herb used in the Western Herbalism tradition to help with Skin Health, Liver Support, Digestive Issues, and Acne, among 2 other conditions it addresses. The aerial parts and leaves are the parts traditionally used, used both internally and topically.

Botanical background

Mahonia aquifolium (Oregon-grape or Oregon grape) is a species of flowering plant in the family Berberidaceae, native to western North America. It is an evergreen shrub growing to 1 m (3 ft) tall by 1.5 m (5 ft) wide, with pinnate leaves consisting of spiny leaflets, and dense clusters of yellow flowers in early spring, followed by dark bluish-black berries.

Source: Wikipedia, via iNaturalist

Parts used

Aerial Parts Β· bothLeaves Β· both
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Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Oregon Grape in freshly boiled water for 5–10 minutes.
  • Cover while steeping.
  • Strain and drink.
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Tincture

20–40 drops in water, 2–3Γ— daily
  • Pack dried Oregon Grape into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
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Powder / Capsule

500 mg – 1 g, 1–3Γ— daily
  • Grind dried Oregon Grape into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
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Topical / Poultice

1–2Γ— daily as needed
  • Mash fresh Oregon Grape or mix the powder with a little water to form a paste.
  • Apply to the affected area for 20–30 minutes.
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Infused Oil

Massage into affected area 1–2Γ— daily
  • Fill a jar with dried Oregon Grape.
  • Pour over a carrier oil until submerged.
  • Leave for 4–6 weeks, then strain.
  • Use topically or as a salve base.
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Herbal Bath

2–3Γ— per week as needed
  • Brew 4–6 tbsp of Oregon Grape in 1 litre of hot water for 15 minutes, strain, and add to a warm bath.
  • Soak for 20–30 minutes.

Contraindications

  • Pregnancy & breastfeeding β€” insufficient safety data; consult your doctor
  • Children under 12 β€” therapeutic dosage not established
  • Active liver disease β€” monitor liver enzymes with long-term use

Warnings

⚠️ Pregnancy & Breastfeeding

Safety during pregnancy and breastfeeding has not been established for most herbal remedies. Consult your midwife or doctor before use.

⚠️ Liver Health

Some herbs used for liver conditions can be hepatotoxic at high doses. Have liver function monitored if using long-term.

⚠️ Allergic Reactions

Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

⚠️ Not Medical Advice

This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

Where to find in nature

Native region

Europe, North America, Australia

Climate

Temperate

Habitat

Meadows, hedgerows, woodland edges, and cottage herb gardens

🌿 To see Oregon Grape growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier β€” never consume a plant you are not 100% certain of.

Where to buy

In store

  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices
  • Farmers markets with herb vendors

Online

iHerb

Wide selection of standardised extracts, capsules, and powders with lab testing

Mountain Rose Herbs

Premium bulk dried herbs β€” certified organic, ethically sourced

Starwest Botanicals

Large selection of certified organic bulk herbs and powders

Herb Pharm

High-quality liquid extracts and tinctures, rigorous quality standards

Amazon

Convenient β€” verify brand certifications and check third-party testing

Etsy

Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

Quality tips

When buying Oregon Grape, look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products β€” quality varies enormously.