Traditional Use: Used for centuries by Native American peoples of California and the Southwest — particularly the Chumash, Ohlone, and Costanoan — as a respiratory remedy, expectorant, and topical analgesic; traditionally prescribed for asthma, bronchitis, coughs, colds, hay fever, rheumatic pain, and as a wound healer and fever remedy.
Potential Benefits: Eriodictyol, homoeriodictyol, and resinous compounds deliver expectorant, bronchodilatory, anti-inflammatory, antioxidant, and antimicrobial effects; research supports meaningful airway-opening and mucus-clearing activity; homoeriodictyol is now used commercially as a bitter-masking compound with emerging research into its own anti-inflammatory properties.
Warnings: Generally considered safe at therapeutic doses with a good tolerability profile; avoid in pregnancy due to insufficient safety data; may cause allergic reactions in sensitive individuals — patch test before topical use; high resin content may cause digestive upset in sensitive individuals if taken in large amounts; limited long-term human clinical safety data available — professional guidance recommended for extended use.






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