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Home/Goals/Digestion/Californian Black Oak

Californian Black Oak for Digestion

Quercus kelloggii

Californian Black Oak bark has been traditionally used in Native American medicine to aid digestion, often prepared as a tea. The tannins and other compounds may help soothe digestive discomfort. Evidence rated moderate (d = 0.30).

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Quercus kelloggii (Californian Black Oak) — botanical photograph
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How it works mechanism

Tannins present in oak species can have an astringent effect on the mucous membranes of the gastrointestinal tract, potentially reducing irritation and promoting healing.
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Other plants for Digestion

8 alternatives
Chamomile
Chamomile
Matricaria chamomilla
moderate
Coptis teeta
Coptis teeta
Coptis teeta
moderate
Cumin - Jeera
Cumin - Jeera
Cuminum cyminum
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Hamburg Parsley
Hamburg Parsley
Petroselinum crispum tuberosum
moderate
Purple Shiso
Purple Shiso
Perilla frutescens nankinensis
moderate
Rhubarb
Rhubarb
Rheum × hybridum
moderate
Berberis capillaris
Berberis capillaris
Berberis capillaris
high
Blond Psyllium
Blond Psyllium
Plantago ovata
high
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Frequently asked

Is Californian Black Oak effective for Digestion?

Californian Black Oak bark has been traditionally used in Native American medicine to aid digestion, often prepared as a tea. The tannins and other compounds may help soothe digestive discomfort. Evidence is rated moderate with an effect size of d=0.30. See the Evidence section above for cited sources.

How does Californian Black Oak compare to other plants for Digestion?

See the alternatives section above — we list other species with documented effects on Digestion, ranked by evidence quality.

Is this medical advice?

No. This is educational reference. Always consult a healthcare professional before using any herbal preparation, especially alongside prescription medication.

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