Boswellia sacra, the prized Omani luban, produces an essential oil distinguished by an exceptionally high alpha-pinene content — confirmed as the principal component across all four commercial grades in one study — alongside limonene and myrcene, which together create a cleaner, more citrus-forward top note than the East African species.^[1] Its taxonomic relationship to B. carterii has long been debated, with some authors treating them as conspecific; the Omani provenance and predominantly alpha-pinene chemotype are now the key distinguishing markers for the sacra designation. Research on the whole essential oil found that B. sacra induced tumour cell-specific apoptosis in cultured human breast cancer cell lines while leaving normal breast cells comparatively unaffected, pointing to bioactive constituents beyond the common monoterpenes.^[2]