Holy Basil

Also known as- Ocimum basilicum. Not to be confused with holy basil (tulsi), Ocimum sanctum, used in Ayurvedic medicine.
Introduction
Fresh basil leaves have a unique aroma not even approximated by any other herb, making them an essential ingredient in cuisines of countries all over the world. There are hundreds of species and their hybrids marketed as basil, but the herb most commonly used in herbal medicine is the Mediterranean or "sweet" basil (although arguably Thai basil is sweeter). Basil produces its essential oils in glands in its leaves that have to be activated by UV-B rays from the sun; the best quality basil is grown in hot, sunny climates.
Constituents
Basil has a unique aroma because of the many constituents of its essential oil. The oil contains 1,8-cineol, citral, eugenol, linalool, methyl chavicol, methyl cinnamate in relatively large quantities and bisabolene, camphor, cryophyllene, geraniol, and ocimene in smaller quantities influencing taste and action in the body.
Parts Used
Dried leaf in teas or essential oils for topical application.
Typical Preparations
The essential oil used topically. As a spice it can liberally used in foods.
Summary
While
most of us are familiar with basil as a culinary herb, the applications
of basil in natural health are not as well known. The essential oil is
antibacterial, and drops of basil oil may relieve ear infections.
European scientists are investigating the use of basil oil as treatment
for antibiotic resistant infections with Staphylococcus, Enterococcus, and Pseudomonas. There are some indications basil oil may help restore immune function damaged by stress.
Basil
oil also helps the active ingredients of other herbs more readily
penetrate the skin when basil oil is added to ointments, liniments, and
salves. Dried basil leaf can be added directly to food or drunk as a tea
(1/2 teaspoon of dried herb steeped for 10 minutes in 1 cup of boiling
water in a closed container) to relieve flatulence and fullness.
Precautions
The German Commission E advised caution in the use of basil because of the estragole
in its essential oil might cause cancer, but later testing indicated
that an increased risk of cancer would only occur in persons who ate
approximately 1,00 kilograms (over a ton) of the herb daily"a finding so impossible as to suggest the CommissionÍs
precaution was completely unwarranted. Nonetheless, the safety of the
herb has not been established for pregnant women, nursing mothers, or
children under six.