Oregano (Scientific name: Origanum vulgare) is also known as Wild Marjoram, Mountain Mint, Origanum, Wintersweet and Winter Marjoram. This erectly spreading plant has strong aromatic characteristics, with leaves and stems that are fleshy. The leaves of oregano are heart-shaped, with toothed edges, and which, grow for up to 9 meters in length. In other countries, the plant is primarily used as a culinary ingredient. However, in countries like the Philippines, Oregano is a known herbal medicine for its strong anti-oxidant properties. Oregano contains a rosmarinic acid compound, thymol, and carvacrol that are responsible for its anti-inflammatory, anti-bacterial, anti-oxidant, anti-fungal and anti-viral properties. Oregano also contains flavinoids, triterpenoids, sterols, vitamin C, and vitamin A. Its anti-bacterial properties have been proven by recent studies to treat infections of the reproductive tracts, and which make it ideal to be given to women who have just given birth.

The volatile oils in oregano and its properties are believed to be responsible for slowing the process of spoilage of food and thus minimizing the risk of ingesting harmful bacteria, parasites and fungi.

The anti-oxidant properties of oregano helps fight free radicals in the body that cause cellular damage and accelerate ageing. Free radicals are believed to be involved with many degenerative diseases like osteoarthritis, atherosclerosis and heart diseases, to name a few.

The most useful parts of this plant are its leaves. The extracts and juices of such are used for asthma, dyspepsia, chronic coughs, bronchitis, and rheumatism. Ear aches have also been proven to be cured by the infusion prepared from its leaves. The leaves relieve painful swellings, boils, and sprains, when their poultices are applied directly to the affected area.