Chaparral (Larrea tridentata): Desert Medicine for Immunity and Detox

Botanical Profile

Chaparral (creosote bush) dominates North American hot deserts. This evergreen shrub (4–12 ft) has waxy, resinous yellow-green leaves that smell intensely of creosote after rain. Flowers: yellow, twisted petals, Feb–Aug. Thrives on well-drained slopes up to 4,000 ft. Hardy to Zone 9.

Traditional and Modern Uses

• Native American: Decoction for stomach issues, diarrhea; twigs for toothache; leaf poultice for respiratory/skin problems; hair tonic for baldness.
• Key constituent: Nordihydroguaiaretic acid (NDGA)—potent antioxidant, inhibits lipoxygenase (reduces inflammatory histamine responses, beneficial for asthma).
• Documented benefits: Capillary strengthening, liver detox acceleration, antitumor activity (uterine fibroids, fibrocystic breast disease), antimicrobial, antiviral.
• Historical: Listed in USP 1842–1942; folk use for LSD residue clearance.

Harvest and Safety

Strip leaves, flowers, seeds, small twigs; discard woody stems. Older plants for external antimicrobial use; young green growth for internal. Dried herb stable 2 years. Caution: Hepatotoxicity reports exist with high-dose/long-term internal use. Use under qualified guidance. Topical applications generally safe.