Guarea (Guarea rusbyi syn. Guarea guidonia)

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Botanical Information

• Family: Meliaceae
• Common Names: Guarea, American Muskwood, Bastard Mahogany
• Parts Used: Bark, leaves, resin

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Description

Guarea rusbyi is a tropical tree native to Central and South America. It has been traditionally used in indigenous medicine for its anti-inflammatory, astringent, and nervous system-calming properties. The bark and resin are particularly valued for treating fevers, digestive disorders, and respiratory ailments.

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Historical and Traditional Uses

• Used by indigenous cultures for fevers, infections, and digestive issues.
• Traditionally employed as a sedative for nervous system disorders.
• Applied externally for wounds, ulcers, and skin irritations.
• Used in South American herbal medicine for liver and kidney support.

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Constituents

• Alkaloids
• Triterpenoids
• Limonoids
• Saponins
• Tannins

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Actions

• Anti-inflammatory
• Astringent
• Nervine (calms the nervous system)
• Antimicrobial
• Hepatoprotective (supports liver function)
• Expectorant

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Medicinal Uses

1. Nervous System Support:
Traditionally used as a calming herb to alleviate anxiety, stress, and nervous exhaustion.

2. Fever and Infection Management:
Bark decoctions are used to reduce fever and combat infections.

3. Digestive Health:
Acts as a bitter tonic to aid digestion and soothe gastrointestinal inflammation.

4. Liver and Kidney Support:
Traditionally used to cleanse the liver and kidneys, promoting detoxification.

5. Respiratory Relief:
Used as an expectorant to clear mucus and relieve congestion in bronchial conditions.

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Preparation and Dosage

Decoction:

• 1-2 tsp of dried bark per cup of water. Simmer for 15-20 minutes and drink up to twice daily.

Tincture:

• 2-4 ml taken up to 3 times daily.

Poultice (Topical Use):

• Crushed fresh leaves or bark applied directly to wounds and inflammatory skin conditions.

Steam Inhalation:

• A handful of dried leaves in hot water, inhaled for respiratory congestion.

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Precautions and Contraindications

• Pregnancy and Lactation: Use with caution and consult a healthcare provider.
• Allergies: Avoid if sensitive to trees in the Meliaceae family.
• Liver Conditions: High doses may impact liver function; use in moderation.

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Energetics (Traditional Medicine Perspectives)

• Traditional Western Herbalism: Warming and drying; supports nervous system, liver, and digestion.
• Traditional South American Medicine: Used for fever, infections, and respiratory conditions.
• Ayurveda: Primarily balances Kapha and Vata, but excessive use may aggravate Pitta.

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Combinations

• For Nervous System Support: Combine with valerian and passionflower.
• For Digestive Health: Combine with gentian and dandelion root.
• For Liver Support: Combine with milk thistle and burdock.

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Harvesting and Storage

• Harvesting: Bark and leaves are best collected in late summer.
• Drying: Air dry in a well-ventilated, shaded area.
• Storage: Store dried plant material in airtight containers away from moisture and light.

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Modern Research

Studies confirm Guarea rusbyi’s anti-inflammatory, hepatoprotective, and antimicrobial properties, reinforcing its traditional applications.

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Guarea remains a valuable herb in both traditional and modern herbal medicine, particularly for nervous system support, digestive health, and fever management.