African basil (nchanwu/efirin) — the intensely aromatic West African scent-leaf used in Igbo and Yoruba cooking, with documented antimicrobial, anti-diabetic, and anti-malarial properties significantly stronger than European sweet basil.
For Yoruba and Igbo diaspora, efirin/nchanwu is the herb that completes a soup — its aroma signals authentic West African cooking. The anti-infective properties are the ancestral knowledge behind 'the scent leaf fights infections' — which is pharmacologically accurate.
African basil's essential oil is dramatically more medicinally active than sweet basil — the eugenol content (50-70% of oil, vs. <3% in sweet basil) provides the strongest natural COX enzyme inhibition of any common culinary herb. Eugenol at this concentration has analgesic activity comparable to clove (which is why dental professionals use eugenol in dental cements). The carvacrol and thymol content gives African basil equal or superior antimicrobial activity to oregano oil — the most antimicrobially active herb commonly available. Blood glucose reduction has been demonstrated in multiple West African rodent studies. Anti-malarial activity comparable to chloroquine has been reported in in vitro Plasmodium studies.
Use fresh in soups (native soup, jollof rice) in last 5 min of cooking. Make tea: steep 4-5 fresh leaves in boiling water 5-10 min. Steam inhalation for respiratory infections. Available fresh at Nigerian grocery stores; dried at West African herbal medicine suppliers.
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