Thuốc sử dụng nguyên liệu lá cây
cỏ rất được ưa chuộng tại Trung Quốc và Đài Loan
Các khoa học gia cho biết một chất thường tìm thấy trong các loại
thuốc bằng lá cây của Trung Quốc là nguyên nhân gây ra tình trạng con số mắc
bệnh thận và ung thư cao tại Đài Loan.
Phóng viên BBC, Matt McGrath, tường thuật.
For thousands of years the aristolochia plant with its
reddish-yellow flowers has been amainstay of Chinese herbal
medicine. Sometimes referred to as birthwort in Europe ,
the toxicnature of the
plant was discovered in the 1990s when dozens of Belgian women began developing
kidney failure and urinary tract cancers. They had been using aristolochia-based slimming aids at clinic.
Now scientists say that the key element, aristolochic acid, is
responsible for the very high levels of kidney disease and urinary tract
tumours in Taiwan . It's estimated that about one in three
of the population there have used herbal medicines containing the toxin. The
country has the world's highestincidence of cancers of the upper urinary tract
- and in theirstudy the
scientists say more than half can be directly linked to the ingredient.
While products containing aristolochic acid are banned in many
countries, one of the big concerns is China . In
2004 a study suggests Chinese farmers produce enough of the plant to dose 100 million people. Scientists are
concerned that in the decades to come, disease caused by the aristolochia will
create an international public health problem of considerable magnitude.
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