Medical Researchers Looking At Sandalwood

Overview

Sandalwood has been praised for centuries for its medicinal properties and ceremonial significance, as well as for its yellowish heartwood (middle of the tree). Taxonomically included in the Santalaceae family and the genus Santalum, this semiparasitic plant (partially use nutrients from other plants; sandalwood seedlings must first become attached to the roots of other plants) is distributed throughout southeastern Asia and the islands of the South Pacific. The most notable members of this group are Indian sandalwood (Santalum album) and Australian sandalwood (Santalum spicatum). Other plant species are sometimes substituted for sandalwoods, such as red sandalwood (Pterocarpus santalinus in the pea family) but are not of the true genus and are of inferior quality. An authentic sandalwood tree grows to a height of about 10 meters (33 feet) and has leathery leaves in pairs, each opposite the other on the branch. Both tree and roots contain yellow aromatic oil; the scent of sandalwood oil persists in the wood for years and used for ornamental boxes and statues. The extracted essential oil is highly prized in Southeast Asia, Saudi Arabia and now the United States.

True sandalwood contains aromatic heartwood (middle) and roots which when harvested are used for furniture items as well as distilled for its highly prized essential oil. Plantations have been set aside in both India and Australia to meet growing demand for Santalum essential oil. Sandalwood harvesting and manufacturing of incense sticks, furniture and essential oil provides great employment for many in India, especially in southern India. The value of sandalwood in India cannot be overstated. Besides its ceremonial significance, sandalwood is used extensively in Indian Ayurvedic medicine. The harvest and processing of sandalwood is strictly regulated and private ownership of the trees is not permitted. Since 1792 trees have been considered of Indian royalty and thus well guarded and protected. These valued trees take decades to develop their rich aromatic wood and are not considered commercially viable until at least forty years of age, but trees have been harvested at thirty to meet rising requests for its processed products.

Much of the valuable wood is found in the roots of sandalwood and thus harvested by uprooting the entire tree versus cutting it at the trunk. In the last few years alone, the price of sandalwood has skyrocketed, mainly due to rising demand and limited supply. Increased demand has mainly come from the perfume and aromatherapy industry. Sandalwood essential oil and paste is used in Indian and Chinese medicine and of course aromatherapy botanical medicine. The perfume industry covets this oil for its ability to blend well with other perfume oils; hence, it is used extensively in hundreds of cosmetic products.

Over the centuries, the use of sandalwood and its products have been an integral part of several religious cultures. It scent, either as an essential oil or ground as incense, is thought to bring one closer to the Divine. Hindus burn incense made from sandalwood oil in burial pyres and at funerals. It’s also used in temples to remind people of the heavenly realms. Yogis in India use the oil to anoint each other during ceremonies and before meditation as well deity statues often made of sandalwood itself.

Sandalwood Used to Fight Anti-microbial Bacteria

In late December of 2009 a length article by the Associated Press entitled “Pressure Rises to Stop Antibiotics in Agriculture” reported on rapidly emerging bacteria that are resistant to current antibiotics from supposed misuse of antibiotics in the agriculture industry. It was all over the internet in a matter of days. The article provides quotes from professors, researchers as well as government agencies all expressing deep concern and even alarm at the rate of microbial resistance to standard treatment. The Union of Concerned Scientists (UCS) web page includes recent studies regarding antimicrobial resistance in Escherichia coli and methicillin-resistant Staphylococcus aureus (MSRA) (both of which cause great harm to humans and animals alike) linked to heavy uses in food agriculture. This scientifically sound web site also provided a press conference statement (way back in 2001) by Margaret Mellon, Ph.D., director of UCS Food and Environment Program stating that 70% of total antibiotic production is devoted to non-therapeutic uses in the cattle, swine and poultry industry. It seems plausible that over the last nine years since this press release, microbes have developed an armor of resistance to antibiotic treatments.

Concern for antibiotic-resistant microbes is worldwide. A need to find alternatives to conventional antibiotic treatment is rising. Essential oils have been gaining attention by research scientists for their antimicrobial properties. A collaborative study of researchers in Austria and Germany (Flavor and Fragrance Journal 2006 May/Jun; 21(3): 465-468) found that santalols of sandalwood (the main chemical components of sandalwood) in medium and/or high concentrations showed significant antimicrobial potential against the yeast Candida albicans, the Gram-positive bacterium Staphylococcus aureus, and the Gram-negative bacteria Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae.

Additional Applications

The Australian and Indian Santalum species, found to be similar in chemical composition, are known by aromatherapists to have such therapeutic properties as anti-inflammatory, antiphlogistic (reduces fever), antiseptic (as mentioned above), antispasmodic (relieves muscle spasms), astringent, carminative (relieves flatulence), demulcent (reduces irritation), diuretic (soft and soothing to skin), emollient, expectorant, as a sedative and general tonic. Their principle chemical constituents are alpha-santalol and beta-santalol. According to a study conducted by the Department of Pharmaceutical Sciences and South Dakota University (Anticancer Research 2007 Jul-Aug; 27(4B): 2185-8) application of the chemical compound alpha-santalol prevents UVB-induced skin tumor development in mice. Sandalwood is also thought to help alleviate the symptoms of depression as reported by the University of Maryland Medical Center (www.umm.edu).

Conclusion

The value of sandalwood in some cultures goes back centuries – from burning the fragrant incense in temples to using the oil in sacred ceremonies. In the commerce of today, sandalwood is highly prized by the perfume industry as well as those in aromatherapy. Recent science studies indicate that sandalwood and its principle component alpha-santalol have antiseptic as well antitumor capabilities. With the growing concern of antibiotic-resistant bacteria of methicillin-resistant Staphylococcus aureus (MRSA) and Candida in both hospital and public environments, serious investigation into the possible uses to of alternative therapies is well underway. Consideration of essential oils, and in this case Santalum album and Santalum spicatum are prime candidates for meeting modern medical needs.

The author believes flower essences are an excellent companion to essential oils. Learn more about flower essences, essential oils and botanical medicine online.