Pharmacognosy intro
Palo Santo's PRIMARY constituent is limonene (58-68%), a monoterpene responsible for the citrus-sweet top note and anxiolytic, anti-inflammatory, and antitumor properties. Additional compounds include alpha-terpineol (8-12%, sedative, anxiolytic, antimicrobial), menthofuran (2-5%, hepatotoxic in high concentrations but present in low amounts), carvone (antispasmodic, carminative), germacrene D (insect repellent, antimicrobial), and minor sesquiterpenes (trans-beta-ocimene, beta-elemene, viridiflorol). The 4-10 year aging process is ESSENTIAL, fresh wood has minimal aromatic compounds. Enzymatic and oxidative processes during natural decomposition convert precursor terpenes into the characteristic aromatic profile. This is NOT arbitrary tradition but chemistry. Limonene modulates GABAergic neurotransmission and serotonin receptor activity, demonstrating anxiolytic and antidepressant effects. It also activates adenosine A2A receptors. Alpha-terpineol potentiates GABA-A receptor activity, contributing to the calming quality. Terpene-rich smoke has documented antimicrobial properties in enclosed spaces, giving traditional "cleansing" a mechanistic basis. Limonene and sesquiterpenes also provide mosquito and insect deterrent effects.