Eden Apothecary · Herb Profile
Origanum vulgare
Pronounced Common: oh-REG-uh-noh (US), or-ih-GAH-noh (UK). Latin: oh-rih-GAH-num vul-GAIR-ee.
Warm, drying pungent aromatic that kindles cold, damp, sluggish digestion and disperses cold catarrh, moving stuck fluids outward through warmth, sweat, and antiseptic pungency.
Culinary amounts as a food seasoning are considered safe. Avoid concentrated medicinal doses, standardized extracts, and oregano essential oil during pregnancy: oregano is a traditional emmenagogue, and its carvacrol- and thymol-rich oil is a potential uterine stimulant, so amounts larger than food use carry a theoretical risk of miscarriage. Human safety data for therapeutic doses in pregnancy are lacking, so medicinal use is not recommended. (AHPA Botanical Safety Handbook, 2nd ed.; Brinker, Herb Contraindications and Drug Interactions; American Pregnancy Association.)
Food-level culinary use is regarded as safe. There are no reliable data on medicinal doses or the essential oil during lactation, so concentrated preparations are best avoided and dietary amounts only are advised. (AHPA Botanical Safety Handbook, 2nd ed.; NCCIH.)
The culinary herb and mild whole-herb tea are generally well tolerated in older children for gas and early colds. Do not give the concentrated essential oil internally to infants or young children, and never apply neat oregano oil to skin or mucous membranes, as the carvacrol- and thymol-rich oil is a strong irritant. Keep any oil well diluted and use only short-term. (NCCIH; AHPA Botanical Safety Handbook, 2nd ed.; Tisserand and Young, Essential Oil Safety, 2nd ed., 2014.)
Distinguish culinary use (safe as a food seasoning) from concentrated therapeutic use. Undiluted oregano essential oil is a strong skin and mucous-membrane irritant and must be diluted; internal use of the oil should be brief, well diluted, and ideally professionally supervised. May provoke allergic reactions in people sensitive to other mint-family (Lamiaceae) plants such as basil, marjoram, mint, sage, and thyme. Large doses of the oil may irritate the gut and, in theory, reduce non-heme iron absorption when taken with meals.
Pregnancy in medicinal or essential-oil amounts (emmenagogue and possible uterine stimulant). Known allergy to oregano or other Lamiaceae herbs. Bleeding disorders and the two weeks before scheduled surgery (concentrated doses). Never apply the neat essential oil to skin or mucous membranes.
Origanum vulgare is a hardy, widely cultivated garden perennial and is not considered at-risk (not listed by United Plant Savers). It is an excellent pollinator plant; prefer home-grown or cultivated material. Note that some wild Mediterranean Origanum relatives, such as Cretan dittany (Origanum dictamnus), are threatened by overharvest, so avoid wild-collected 'oregano' of uncertain species.
Origanum vulgare itself is not named in canonical Scripture. Its Levantine relative Origanum syriacum (Syrian oregano, za'atar) of the same genus is a leading scholarly identification of the biblical hyssop (Hebrew ezov), the small aromatic plant used to apply blood at Passover (Exodus 12:22), in purification rites (Leviticus 14:4-6; Numbers 19:18), and in Psalm 51:7 ('Purge me with hyssop, and I shall be clean'). The genus was well known to Greek and Roman writers: Dioscorides described origanon and Pliny praised its warming, digestive virtues.
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