Oregon Grape

Identity

Common Name

Oregon Grape

Scientific Name

Mahonia aquifolium

Botanical Family

Berberidaceae

Native Region

Western North America

Cultivation Regions

Pacific Northwest, western North America

Plant Parts Used

Root, Root bark

Synonyms

Oregon Grape Holly, Mountain Grape, Holly-Leaved Barberry

Caffeine Level

Caffeine Free

An evergreen shrub with glossy spiny holly-like pinnate green leaves, clusters of small bright yellow flowers, and dangling clusters of round blue-purple grape-like berries; the root and root bark are used (sometimes the leaf).

Historical Background

Oregon grape has been an Indigenous Pacific Northwest medicine for centuries, its bright yellow berberine-rich root used much like goldenseal for skin, liver, and infection. A sustainable native alternative to goldenseal, it remains a potent, bitter, practitioner-guided herb.

Earliest recorded uses: Indigenous Pacific Northwest traditions for centuries; a bitter yellow root for skin, liver, and infection.

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

Flavor & Aroma

Aroma: Bitter, tart, slightly fruity, earthy

Tea Information

Research Summary

Oregon grape has a tradition as a bitter liver, skin, and antimicrobial root; berberine shows antimicrobial and anti-inflammatory activity in vitro, and some topical use for psoriasis. Clinical evidence for internal tea is limited; it is not a treatment for psoriasis, liver disease, infection, or any disease, and its strong alkaloids warrant short-term, cautious use.

Evidence levels reflect the currently available scientific literature and may change as new research emerges. Where evidence is limited or conflicting, this is stated plainly.

References & Sources