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Over
80% of the world's population relies on herbs for health. Diverse cultures use
herbal remedies to treat disease and promote well-being. Many laboratory-produced
drugs are derived from plants, but herbal remedies differ from conventional
medicine in using parts of the whole plant rather than isolating single active
ingredients. In the past 200 years, plant species from North America, Africa,
and Australasia have become part of Western herbalism, and today herbs from other
cultures are being introduced as herbal medicine experiences a resurgence in popularity.
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| HISTORY
Some
of the earliest records of medical herbalism can be found in Egyptian papyri
dating from 1500 B.C., which refer to many remedies still in use today. Ancient
civilizations in China (see page 140), Persia, India (see page 144), and the
Americas also relied on medicinal herbs. It was the writings of classical
physicians, however, that expanded the knowledge of Western herbalism. Texts on
herbal medicine, such as De Materia Medica (1st century A.D.) by
Dioscorides, an army doctor who traveled throughout the Roman Empire, and De
Simplicibus (2nd century A.D.) by Galen, were used by Islamic physicians
right up to the Middle Ages. This learning filtered back to Europe with the
Crusaders, and the texts were translated into Latin again.
Herbal
folklore was the medicine of the people, part of an oral tradition in Europe,
while Greek and Arab herbal lore was the prerogative of monks practicing in
monasteries. Only upon the invention of the printing press in the 15th century
did this knowledge become available to anyone who could read, and herbalism
flourished for the next 200 years. The 16th century scientist Paracelsus
advocated the "doctrine of signatures," an ancient theory that a
plant's appearance gave clues as to the ailments it treated. His work
influenced John Gerard, whose Herball appeared in 1597, and Nicholas
Culpeper, author of The English Physitian (1653).
With
the growth of science in the 18th century, herbal medicine began to decline in
Europe, although New World settlers retained their allegiance to herbal lore
and also adopted indigenous remedies. Samuel Thomson, a descendant of the
Pilgrim fathers, set up herbal schools in the US in the early 19th century. His
ideas were taken back to Europe in 1830, and led to a revival of herbalism in
the UK.
Conventional
medicine remained dazzled by pharmaceutical breakthroughs until the 1970s, but
a World Health Organization report concluded that herbal remedies could fulfill
an important role in modern health care. Medical herbalism is now well
established in continental Europe and can be studied at British universities.
In the US, laws restricting the sale of herbal remedies were relaxed in 1994.
Herbalism
is a holistic medical system that seeks to restore the body's self-healing
mechanism, or "vital force," and prescribes remedies tailored to the
patient, not the symptoms. Rather than treating symptoms in isolation,
herbalists look for the cause of illness, such as poor diet, an unhealthy
lifestyle, or excessive stress, which may have overburdened the body's fine
balance. Herbalists attribute disease to disturbances in the body's
self-regulating state of harmony ("homeostasis"). Remedies promote
healing by supporting the efforts of the body's vital force to restore
homeostasis. Much of the herbalist's skill lies in knowing the actions of
different plants on specific body systems; for example, a plant may stimulate
the circulation or calm the digestive system.
Herbal
"synergy" is a key factor in medical herbalism. According to this
theory, parts of whole plants are more effective than the isolated constituents
used in drugs that are made synthetically.
EVIDENCE & RESEARCH
Evidence
to support herbal medicine is growing fast, and can be as strong as that for
pharmaceutical drugs. In Europe and Australia, herbal products need to be
backed by scientific evidence before they are allowed to make medicinal claims.
This provides incentive for research.
In
the US, it is illegal to state therapeutic uses for herbal products on the
label. Clinical research supports the claims made for many herbs, including:
Echinacea:
Traditionally used by Native Americans, this herb appears to stimulate the
immune system and prevent infections by increasing the flow of white blood
cells. It is being investigated as a treatment for Hiv and Aws, and in Germany
is an approved treatment for many disorders, including multiple sclerosis. Garlic:
The subject of over 1,000 research papers, garlic lowers blood cholesterol and
fat levels, and reduces blood pressure.
Research
since the 1980s, especially in the US, Germany, and Japan, has verified its
antibiotic and antiseptic actions and its ability to fight certain cancers. Ginger:
In 1990 a British study showed ginger to be of benefit in relieving nausea in
postoperative patients. Ginkgo: One of the oldest living plant species,
ginkgo is the best-selling herbal medicine in France and Germany. Research
carried out in France in 1986 provided evidence of its effectiveness in
treating tinnitus, while a study published in The Lancet in 1992 showed
that it improved blood circulation. St. John's Wort: A study published
in The Lancet in 1996 showed this herb can treat depression as
effectively as synthetic antidepressants, and without side effects.
Many
doctors view herbalism as an outdated tradition, although they realize that
plants are the source of many synthetic drugs. However, doctors stress that not
all herbs are safe, that their constituents are difficult to standardize, and
that herbal medicines should only be taken with expert advice. If the evidence
for herbal treatment of diseases were more widely known, doctors might be more
willing to use them, especially now that they are being mass-produced in tablet
form and made more widely available.
CONSULTING
A PRACTITIONER
Practitioners
have some knowledge of biology, anatomy, and physiology, as well as plant
pharmacology, but their approach to treating illness is holistic and they will
consider all aspects of your life before prescribing treatment. Your first
consultation will usually last an hour, during which the practitioner will take
an extensive medical history. She will ask you about your lifestyle - focusing
on areas of stress - and about your diet, work, mental and emotional state, and
recent life events. Details of any conventional medication you are taking will
also be recorded to ensure compatibility with the herbal remedies prescribed.
The
practitioner will carry out some simple tests or give you a physical
examination, for which you may need to undress. Based on her conclusions, she
will prescribe one or more herbal remedies, which can normally be made up on
the spot. Treatment may also include advice on diet and exercise. You will
probably be asked to return in a week or two, or earlier if your condition is
acute. If appropriate, the herbalist may suggest that you see a conventional
doctor. Herbal remedies usually take longer to work than conventional medicine,
and should generally be taken for a week or two after symptoms disappear.
PRECAUTIONS
Consult a qualified herbalist before taking an herb if you are taking
prescribed medication, and do not discontinue a medicine without telling your
doctor.
Consult
a qualified herbalist before taking herbal medicine if you are pregnant, or if
you have heart disease, hypertension, high blood pressure, or glaucoma.
Epilepsy
and insulin-dependent diabetes are best treated with conventional medicine.
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