Plantago major

Plantago major (broadleaf plantain, white man's foot, or greater plantain) is a species of flowering plant in the plantain family Plantaginaceae. The plant is native to most of Europe and northern and central Asia, but has widely naturalised elsewhere in the world.

Plantago major is one of the most abundant and widely distributed medicinal crops in the world. A poultice of the leaves can be applied to wounds, stings, and sores in order to facilitate healing and prevent infection. The active chemical constituents are aucubin (an anti-microbial agent), allantoin (which stimulates cellular growth and tissue regeneration), and mucilage (which reduces pain and discomfort). Plantain has astringent properties, and a tea made from the leaves can be ingested to treat diarrhea and soothe raw internal membranes.

Broadleaf plantain is also a highly nutritious wild edible, that is high in calcium and vitamins A, C, and K. The young, tender leaves can be eaten raw, and the older, stringier leaves can be boiled in stews and eaten.

The leaves are edible as a salad green when young and tender, but they quickly become tough and fibrous as they get older. The older leaves can be cooked in stews. The leaves contain calcium and other minerals, with 100 grams of plantain containing approximately the same amount of vitamin A as a large carrot. The seeds are so small that they are tedious to gather, but they can be ground into a flour substitute or extender.

Plantain is found all over the world, and is one of the most abundant and accessible medicinal herbs. It contains many bioactive compounds, including allantoin, aucubin, ursolic acid, flavonoids, and asperuloside. Scientific studies have shown that plantain extract has a wide range of biological effects, including "wound healing activity, anti-inflammatory, analgesic, antioxidant, weak antibiotic, immuno modulating and antiulcerogenic activity".

For millennia, poultices of plantain leaves have been applied to wounds, sores, and stings to promote healing. The active constituents are the anti-microbial compound aucubin, the cell-growth promoter allantoin, a large amount of soothing mucilage, flavonoids, caffeic acid derivatives, and alcohols in the wax on the leaf surface. The root of plantain was also traditionally used to treat wounds, as well as to treat fever and respiratory infections.

Due to its astringent properties, a tea of plantain leaves can be ingested to treat diarrhea or dysentery. Due to the high vitamin and mineral content, plantain tea simultaneously replenishes the nutrients lost as a result of diarrhea. Adding fresh plantain seeds or flower heads to a tea will act as an effective lubricating and bulking laxative and soothe raw, sore throats.

When ingested, the aucubin in plantain leaves leads to increased uric acid excretion from the kidneys, and may be useful in treating gout.