


Also known as
Bitterwood • Amargo • Quassia amara
NATIVE TO
Northern South America & the Caribbean



ORIGINS & USES
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Used for centuries by Indigenous peoples of the Caribbean and northern South America to support digestion and address parasitic and febrile conditions
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Naturally rich in quassinoids, intensely bitter compounds associated with digestive stimulation and antimicrobial activity
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Named after Graman Quassi, an 18th-century Surinamese healer whose knowledge brought the plant into European herbal medicine
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Traditionally prepared as a decoction or infusion to stimulate appetite, support gut health, and promote internal cleansing
RESEARCH
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Studies suggest quassia exhibits antimicrobial, antiparasitic, and anti-inflammatory activity in laboratory studies
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Research indicates its bitter compounds may stimulate digestive secretions and support appetite and digestive efficiency
NOTES
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Generally well tolerated in small doses; excessive intake may cause nausea or digestive irritation
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Not recommended during pregnancy or long-term continuous use due to potency
