GARLICGarlic (
Allium sativum) is a perennial plant in the family Alliaceae and genus Allium, closely related to the onion, shallot, and leek. It does not grow in the wild, and is thought to have arisen in cultivation, probably descended from the species
Allium longicuspis, which grows wild in south-western Asia. Garlic has been used throughout all of recorded history for both culinary and medicinal purposes.
Garlic plantsThe portion of the plant most often consumed is an underground storage structure called a head. A head of garlic is composed of a dozen or more discrete cloves, each of which is a botanical bulb, an underground structure comprised of thickened leaf bases. Each garlic clove may often be composed of just one leaf base, unlike onions, which almost always have multiple layers. The above-ground portions of the garlic plant are also sometimes consumed, particularly while immature and tender.
Garlic bulb and individual cloves, one peeledGarlic has a powerful pungent or "hot" flavor when raw, which mellows considerably when it is cooked. Raw or cooked, garlic is noted for its strong characteristic odor, and for giving those who eat it a distinctive breath odor as well. Some cultures accept the odor of garlic more than others. Northern European cuisines, for example, use garlic only modestly and tend to cook it for long periods of time to diminish its strength.
Like other members of the onion family, garlic actually creates the chemicals that give it its sharp flavor when the plant's cells are damaged. When a cell of a garlic clove is broken by chopping, chewing, or crushing, enzymes stored in cell vacuoles trigger the breakdown of several sulfur-containing compounds stored in the cell fluids. The resultant compounds are responsible for the sharp or hot taste and strong smell of garlic.
Although people have come to enjoy the taste of garlic, these compounds are believed to have evolved as a defensive mechanism, deterring animals like birds, insects, and worms from eating the plant.
Garlic flowerheadCulinary useGarlic is most often used as a seasoning or a condiment. When crushed or finely chopped it yields allicin, a powerful antibiotic and anti-fungal compound (phytoncide). It also contains alliin, ajoene, enzymes, vitamin B, minerals, and flavonoids.
Garlic is widely used in many forms of cooking for its strong flavor, which is considered to enhance many other flavors.
When eaten in quantity, garlic may be strongly evident in the diner's sweat and breath the following day. This is because garlic's strong smelling sulfur compounds are metabolized forming allyl methyl sulfide.
Allyl methyl sulfide (AMS) cannot be digested and is passed into the blood. It is carried to the lungs and the skin where it is excreted. Since digestion takes several hours, and release of AMS several hours more, the effect of eating garlic may be present for a long time.
The well-known phenomenon of "garlic breath" is alleged to be alleviated by eating fresh parsley. Because of its strong odor, garlic is sometimes called the "stinking rose".
Medicinal UsesGarlic has been used throughout the ages to ward off disease, and has saved many lives in epidemics of infectious diseases. It is antibacterial and gives protection against colds and flu. Garlic improves circulation and lowers blood pressure. In clinical studies, garlic reduced cholesterol levels. Further studies indicate that garlic may have a positive role in the prevention of coronary heart disease, thrombosis and arteriosclerosis. It may even offer some degree of protection against cancer.
Superstition and mythologyGarlic has been seen as a force for both good and evil. A Christian myth says that after Satan left the Garden of Eden, garlic arose in his left footprint, and onion in the right. Even in Europe, though, many cultures have turned to garlic as a protective force or white magic, perhaps because of its reputation as a powerful preventative medicine. Central European folk beliefs considered garlic a powerful ward against devils, werewolves, and vampires. To ward off vampires, garlic could be worn on one's person, hung in windows, or rubbed on chimneys and keyholes.