TEA
TREE OIL
(Melaleuca
Alternifolia)
Article
by
Cynthia Olsen
In
a poll conducted by Prevention Magazine and
reported by NBC News, one-third of Americans
use herbal medicines and spend an average
of 54 US dollars on herbal products, adding
up to 3.4 billion dollars worth of sales.
People take herbs for several reasons. Individuals
prefer taking natural medicines than pharmaceutical
drugs and OTC drugs for self treatable health
problems.
In today's societies, natural medicine is
becoming more mainstream. The baby boomers
now make up a large portion of consumers in
the natural products industry. Sales of herbs
in the United States market alone in the natural
health food stores and chain stores rose over
20% between 1994 and 1996, and continue to
rise in popularity, while other countries
in the world are following suit. In a poll
conducted by Prevention Magazine and reported
by NBC News, one-third of Americans use herbal
medicines and spend an average of 54 US dollars
on herbal products, adding up to 3.4 billion
dollars worth of sales. People take herbs
for several reasons. Individuals prefer taking
natural medicines than pharmaceutical drugs
and OTC drugs for self treatable health problems.
Secondly,
the herbs are consumed to maintain wellness
and increase strength and elevate immune system
functions. Thirdly, herbs are taken to prevent
degenerative diseases. The scientific studies
and implementation of these herbs is timely,
due to the fact that airborne viruses and
immune deficiency disorders are becoming more
commonplace in our societies and many allopathic
medicines do not seem to have the capacity
to control, let alone cure, these chronic
illnesses.
Melaleuca
alternifolia, (tea tree oil) has become
increasingly more known and used as a first
aid remedy for a number of skin ailments.
The scientific research in Australia and in
the U.S. have confirmed the efficacy in treating
bacterial and fungal skin infections and also
verifying minimal adverse reactions.
To
quote Dr Paul Belaiche, Chief of Phytotherapy
Department at the University of Paris, France,
"The essential oil of Melaleuca has
entered the team of major essential oils and
emerges as an antiseptic and antifungal weapon
of the first order in phyto-aromatherapy."
The
Discovery of Tea Tree Oil
In
1770, Captain James Cook of the British Royal
Navy disembarked from the H.M.S. Endeavor
at Botany Bay, Australia – near the eventual
site of Sydney. From there, he travelled north
through the coastal regions of New South Wales,
where he came upon groves of trees thick with
sticky, aromatic leaves that, when boiled,
rendered a spicy tea. The early explorers
could not have known that 150 years later,
Melaleuca alternifolia (tea tree)
as it was called by Captain Cook, would be
used as a medicinal agent for cuts, burns,
bites, and a host of skin ailments.
In
1923, Dr. A.R. Penfold, curator and chemist
at the Government Museum of Technology and
Applied Sciences in Sydney, Australia, conducted
a study of the leaves of the tea tree. Dr
Penfold discovered their essential oils to
be thirteen times stronger as an antiseptic
bactericide than carbolic acid, considered
the universal standard in the early 1900s.
Dr Penfold noted Melaleuca alternifolia is
quite common, and exists in very large areas
in the North Coast district of New South Wales.
It yields 1.8% of an oil of pale lemon tint,
with a pleasant terpenic myristic odour. This
is prepared on a commercial scale, and is
particularly recommended as a non-poisonous,
non irritant antiseptic of unusual strength,
the Rideal-Walker coefficient being 11.
The
oil contains 50-60% of terpenes (pinenes,
terpinene and cymene), from 6-8% of cineole
(accounting for the camphoraceous odour) and
an alcohol terpineol, which supplies the pleasant
nutmeg-like odour, also small amounts of sesquiterpenes
and their corresponding alcohols. The valuable
antiseptic properties of the oil and its spicy
flavouring note should prove useful in dentrifices
and mouthwashes."1"
In
a 1972 study done on various foot problems,
i.e.: athletes foot, fungal infections, under-toenail
corns, and calluses, Dr. Walker used tea tree
oil in three different formulas; first as
a pure oil; second, 40% oil with 10% isopropyl
alcohol (which allows the oil to be water
miscible, giving it another name, Melasol)
and third, 8% oil with lanolin and chlorophyll.
Sixty patients were involved in the study.
Forty
were put on Melasol, 20 applied the ointment
and 8 used the pure oil. Treatments varied
from three weeks to four years. Out of 68
patients, 58 found relief from their foot
problems over a period of six years. At least
four different fungal conditions are affiliated
with athlete's foot, all of which responded
well using tea tree oil. "2"
Standard
treatments from fungal infections of the nails
(onychomycosis) include debridement (removal
of foreign matter and dead or damaged tissue),
topical medication, and systemic therapies.
This study assessed the efficacy and tolerability
of topical applications of 1% clotrimazole
solution compared with that of 100% Melaleuca
alternifolia (tea tree) oil for the treatment
of toenail onychomycosis.
In
a six month double-blind, mutilcentre, randomised,
controlled trial of 117 patients with distal
subungal onychomycosis, participants received
twice-daily applications of either 1% clotrimazole
(CL) solution (topical antifungal drug), or
100% tea tree (TTO) oil. Debridement and clinical
assessment were performed at 0, 1, 3 and 6
months; cultures obtained at 0 and 6 months.
After 6 months, the two groups were comparable
based on culture cure (CL=11%, TTO=18%). Three
months later, approximately half of each group
reported continued improvement or resolution.
It
was concluded that, while all current therapies
have high recurrence rates, the use of a topical
preparation in conjunction with debridement
is an appropriate initial treatment. Topical
therapy, including the above two preparations,
provides improvement in nail appearance and
symptoms, while oral therapy has the disadvantage
of high cost and potentially serious adverse
effects.
This
study reinforces the need to use a potent
(in this case 100%) concentration of tea tree
oil to produce better short-term and long-term
efficacy. In children and those with skin
sensitivity, a 70% solution may be better
tolerated. "3"
Hospital
patients are susceptible to contact with infectious
bacteria that can be easily transmitted through
hospital staff members. One such common bacteria
is Staphylococcus aureus. The bacteria was
tested for antibiotic resistance. Tea tree
oil dilutions of 0.2% - 2.0% were added to
the cultures of the bacteria, and growth measured.
The effective tea tree dosage to inhabit the
bacteria was 0.25%; 0.5% killed the bacteria.
There were few side effects from skin irritation.
These in-vitro results suggest tea tree oil
may be useful in the treatment of MRSA carriage.
"4"
A
new protocol for antimicrobial testing of
oils" is a paper about the bactericidal testing
of oil distilled from the tea tree (Melaleuca
alternifolia and M. linariifolia) for FDA
recognition of tea tree oil as a safe and
effective topical ingredient. It would be
the first natural topical antiseptic so recognised.
The difficulty in testing tea tree oil is
that the pure oil is not water soluble, and
floats to the top of the bacterial medium.
The FDA's proposed method for testing has
been to use water soluble and/or miscible
products together with a chemical neutraliser.
In
this test, a protocol was established to test
the oil in non-water-soluble form, using a
non-toxic solvent. Tea tree oil demonstrated
the FDA required bactericidal 3 log kill against
Pseudomonas aeruginosa, Staphylococcus
aureus, and Escherichia coli.
These
three organism have been selected by the FDA
because of their prevalence and life-threatening
potential. The authors have petitioned the
FDA to include this new protocol in proposed
21 CFR 333.71 (d) ii, "Bactericidal Assay
Procedures" in the testing monograph for First
Aid Antiseptic Drug Products. "5"
ISO
International Standard 4730
ISO
Standard 4730 states that tea tree oil should
be extracted from the Melaleuca alternifolia,
Melaleuca linafolia, or Melaleuca
dissitifolia species of the Myrtaceae
family. Other tea tree species, including
Cajuput (Melaleuca cajuputi), New
Zealand Manuka (Leptospermum scoparium),
New Zealand Ti-Tree (Cordyline australis),
and Kanuka (Leptospermum ericoides),
are not highly regarded, as they do not contain
the same anti-microbial benefits, nor have
they been in use for nearly a century as has
Melaleuca alternifolia.
Precautions:
1. Avoid contact with eyes.
2. Keep out of the reach of children.
3. Do not take internally without consulting
your health practitioner. This precaution
does not include the use of toothpaste, mouthwash
(without swallowing) or douche.
4. Dilute with Extra Virgin Olive Oil before
use on baby's skin
5. Do a patch test before using on sensitive
skin. Extremely sensitive skin may need dilutions
of the pure oil. Dilutions of 1:250 are still
bacteriostatic against pathogenic streptococci
and staphylococci, typhus, pneumococcus, and
gonococcus.
6. Store separately from homeopathic remedies.
7. Pregnant women should take extra precaution.
Patch
Test
Put
a few drops of tea tree oil on a cotton swab
and apply to the inside of the arm. If you
have an adverse reaction, irritation will
appear on the skin within a matter of minutes.
If the patch test doesn't indicate any irritation
or allergic reaction, you may use a few drops
of tea tree oil directly on the problem area
of the skin once or twice a day.
Storage
Always keep tea tree oil in amber-coloured
bottles and store in a cool dry place. The
oil will stay potent and will not deteriorate
from exposure to light, air, and heat. Do
not store in plastic bottles. Cap should be
on tight to avoid oxidation and evaporation.
Do
not store or use tea tree oil near homeopathic
remedies, as it may contaminate your remedy.
Shelf
life is generally two to three years if properly
stored. There have been reports of tea tree
oil retaining its efficacy after being stored
for much longer periods of time; however,
perhaps due to stricter guidelines from various
government regulatory bodies, it is now recommended
that the oil be stored for a maximum of three
years.
Source
for additional information
Australian
Tea Tree Oil Guide third edition, revised,
1998 by Cynthia Olsen Published by Kali Press,
Pagosa Springs, Co USA ISBN 1-890941-01
References
1
Penfold,A.R., and F.R. Morrison. "Some Notes
on the Essential Oil of Melaleuca alternifolia."
Australian Journal of Pharmacy, March
30, 1930. British Medical Journal,
1933.
2 M Walker, Foot Problems, Current Podiatry,
April 1972.
3 D.S. Buck, D. M. Nidorf, and J.G. Addino,
Treatment of Nail Fungus: A Comparison of
Two Topical Preparations. Journal of Family
Practice, June; 38(6):
601-5 1994.
4 Carson, C.F., B.D. Cookson, H.D. Farrelly,
and T.V. Riley. "Susceptibility of methicillin-resistant
Staphylococcus aureus to the essential oil
of Melaleuca alternifolia." Journal of
Antimicrobial Chemotherapy, 35:
421-424 1995.
5 Smith, Martha D., Patricia L. Navilliat.
A new protocol for antimicrobial testing of
oils." Journal of Microbiological Methods
28 (1997) 21-24
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