Asthma in Children
Asthma afflicts some 17 million Americans, including at least 5 million
under 18, and kills about 5,400 people annually. While it is partly inherited,
other less-understood factors also are at work. Two recent German studies
similarly found asthma less common in children who started day care early,
and other research indicates that growing up in the country, on a farm
with animals or in a home with a dog protects against asthma, noted Dr.
Sandra C. Christiansen of Scripps Research Institute. A new study, funded
by the National Heart, Lung and Blood Institute, published in recently
in the New England Journal of Medicine suggests that early exposure to
other youngsters and their germs appears to protect children from developing
asthma later on. In the study, researchers at the University of Arizona
College of Medicine looked at the respiratory health of some 1,000 children
over a 15-year period. The study found that children who attended
day care in their first six months or had two or more older siblings were
about half as likely to have asthma at age 13 as youngsters who had one
or no older siblings and did not attend day care until they were older.
This echoes the hot new "hygiene theory" that says children who do not
get outside and get dirty every now and then are not being exposed to enough
germs to stimulate proper development of their immune systems. Some doctors
say that more research on children's immune systems is needed before we
know whether the benefits of exposure to common germs outweigh the risks.
Fatless Food Impact on Kids
Reducing dietary fat may be okay even for very young kids. Reducing
fat intake to prevent heart disease can start before age two without harming
children's neurological development, researchers in Finland have found.
The finding contradicts the advice of health experts, who have recommended
against restricting fat before age two out of concern too lean a diet could
harm development of children's rapidly growing brains. The study of 496
Finnish children followed from seven months of age to 5 years could point
to remedies for childhood obesity in developed nations, said some experts
not involved in the study. The study, led by Dr. Leena Rask-Nissila of
the University of Turku in Turku, Finland, appears in the Journal of the
American Medical Association.
The ancient Persians didn't have much patience for a woman's periods. If she continued to bleed after four days, she could be whipped, then placed in isolation for five more days. A woman in ancient Persia may have experienced 100 periods in her lifetime. Women today get their periods earlier, have fewer children, experience menopause later, so that a childless woman might have 480 periods in her lifetime. A lot of women with uncomfortable periods have known for a long time that birth control pills in the right dosage can make periods stop altogether. The pill delivers a combination of two hormones, estrogen and progestin, that prevents a woman's body from going through its monthly preparation for pregnancy. Normally, seven out of the 28 pills in a monthly pack contain no hormones, allowing the woman to menstruate at the end of the cycle, which is the body's way of clearing a path for the next ovulation. But, if women skip the seven placebo pills and take full-strength birth control every day, their periods stop. The major "new" argument that leaders of the anti-period movement are raising focuses on the reduced disease risk that is derived from birth-control pills. Women on the pill for five years cut in half their risk of ovarian cancer, which kills 14,000 US women annually, and they reduce the risk of endometrial cancer. Studies also show that benign cysts of the ovaries and breasts as well as pelvic inflammatory disease decrease with pill use. In addition, Anderson said periods can intensify existing conditions, such as epilepsy, asthma, rheumatoid arthritis, and migraines. Anemia, an iron-deficiency disorder that afflicts millions of menstruating women worldwide, is linked to menstrual periods. Cautioon: Some cancer risks may be increased by the pill. There is still uncertainty as to whether continued use of estrogen causes an increased risk of breast cancer, the leading cause of cancer among women.
DASH Diet
The DASH diet, which may lower blood pressure, also reduces levels
of homocysteine, a possible independent risk factor for heart disease and
stroke, researchers report in Circulation: Journal of the American Heart
Association. DASH refers to the Dietary Approaches to Stop Hypertension
trial, a multi-center trial designed to assess how dietary patterns affect
blood pressure. The DASH diet is a low-fat diet rich in fruits, vegetables
and low-fat dairy products. Previous studies have shown an association
between high blood levels of homocysteine - a by-product of protein metabolism
- and increased rates of heart attack and stroke. There are multiple benefits
if you start early to eat right.
Green Tea
Reports suggest that it may be useful in preventing and treating a
variety of human skin disorders. Santosh K. Katiyar, Ph.D., and colleagues
in the department of dermatology at Case Western Reserve University, reviewed
several of these studies about green tea and reports. The substances in
green tea thought to protect against cancer are called polyphenols, which
have antioxidant properties that can cancel out the damage caused by free
radicals. Free radicals are molecules that damage cells'' DNA and as a
result can begin the process of a cell turning cancerous. Dr. Katiyar
says it is better to drink green tea to benefit from its antioxidants.
But he adds that it could be useful if applied topically on the skin. It
may protect against damage from environmental pollutants, especially ultraviolet
radiation from the sun, according to the researcher.
"Supplementation of skin care products with green tea may have a profound impact on various skin disorders in the years to come," he says. Tea is commercially available in three forms: green tea, black tea and oolong tea. Of the total tea production, about 78 percent is consumed as black tea, mainly in India and Western countries, while about 20 percent is consumed as green tea, mainly in Asian countries. Green tea is made from the fresh leaves of the tea plant by steaming and drying them at high temperatures. Although skin-care products containing green tea are already available in the market, the products most likely have not been tested in clinical trials and the concentration of green tea polyphenols they contain is not uniform, according to the researchers.
Both black tea and green tea have been studied for their health effects. Some of these studies have looked at whether black or green tea prevents cancer or can even cause cancer. Most have come down on the side of tea having a protective effect. But it has been hard to prove and it is not clear whether it is green or black tea, or both, that is protective or which cancers might be prevented by drinking tea. Iman Hakim and colleagues from the University of Arizona report that drinking hot, strong, black tea may lower a person’s risk of developing squamous cell skin cancer.
According to ACS guidelines, the most important ways to lower the risk of skin cancer are to avoid being outdoors in intense sunlight too long and to practice sun safety when you are outdoors, including: -seeking shade; -wearing clothing to protect your skin; -wearing sunglasses; -using sunscreen with at least sun protection factor (SPF) 15; and -avoiding tanning beds and sun lamps and other sources of UV light. A diet high in fruits and vegetables has been proven to lower risk of some cancers and green tea should be considered an addition to – not a substitute for – a diet high in fruits and vegetables.
Fruits and Vegetables
Phytochemicals in apples seem to slow the rate at which collections
of cancer cells grow. Consuming these phytochemicals in the form of fresh
fruit could be a better way to get the cancer protection of antioxidants
than taking vitamin C supplements, according to a recent report in the
journal Nature (Vol. 405, No.6,789). Antioxidants protect cells from DNA
damage that can be caused by very unstable forms of oxygen called free
radicals. Such DNA damage can be the first step in a normal cell turning
cancerous. Although free radicals occur during the course of normal cellular
metabolism, their formation is accelerated by exposure to radiation and
cancer-causing chemicals. The researchers measured the antioxidant
capacity of 100 grams of apple extract and found it was about the same
as 1,500 milligrams of vitamin C. Because there is only about five milligrams
of vitamin C in that amount of apple extract, the researchers knew the
antioxidant effect must come from other phytochemicals (plant chemicals)
in the extract. An average-size apple weighs about 140 grams. When the
researchers introduced their apple extract into human colon cancer cells
or liver cancer cells, they found it slowed their rate of reproduction
markedly. The anti-cancer effect was strongest in extracts made from
unpeeled apples, which contain more phytochemicals. The researchers believe
the large amounts of antioxidant phytochemicals found in the apple extract
may help to explain the cancer protection provided by a diet that includes
five servings of fruits and vegetables a day. Experts with the American
Cancer Society (ACS) says it’s too early to say which substances in apples
provide the protection and that the best way to lower your risk of cancer
is to eat enough fruits and vegetables. "And since we don’t know
yet, the surest way to get that protection is to eat a wide variety of
fruits and vegetables every day, and at least five servings a day. We know
that from very large dietary studies that have been done." The ACS
estimates that about one-third of all cancers could be prevented by eating
a healthy diet and getting enough physical activity.
Blueberries are loaded with antioxidants. Antioxidants seem to help
prevent cancer and heart disease by avoiding and repairing damage caused
by free radicals. Scientific analysis ranks prunes highest in antioxidants,
followed by blueberries, raspberries, strawberries, raisins, plums, red
grapes and cherries. Many vegetables and whole grains are also excellent
sources of antioxidants. But remember that their antioxidant function is
only one of the many benefits they provide. Some foods that are not as
high in antioxidants may be excellent sources of fiber, minerals, non-antioxidant
vitamins and phytochemicals like ellagic acid and indoles, which serve
other anti-cancer functions.
Rather than looking for the one "best" fruit or vegetable, focus on
eating an abundance of a wide variety. Aim for at least five servings a
day. If you can get to the nine or ten servings common in many parts of
the world, so much the better.
Smoking and Bladder Cancer
In a recent issue of the journal Cancer, Maurice P. A. Zeegers, of
the department of epidemiology at Maastricht University, and his colleagues
found people who smoked 20 or more cigarettes per day had a risk of developing
urinary tract cancers that was more than three times the risk of nonsmokers.
The risk for people who smoked fewer cigarettes was still more than double
the risk of nonsmokers. Smoking is the most preventable cause of
death in our society. In fact, nearly one in five deaths in the United
States results from the use of tobacco. Based on research from the American
Cancer Society (ACS), each year smoking claims more than 400,000 lives
in the U.S.
Measure of Longevity
of a Western Marriage
Your hormones may hold the key. A couple's chances of a happy
marriage can be gauged in half an hour by measuring hormonal changes in
a woman's body. Researchers from the Ohio State University College of Medicine
found that measuring the level of the stress hormone cortisol may
be a good gauge of marital woes. Women whose cortisol levels rose during
discussions about their marriage were twice as likely to get divorced 10
years later!
Five
Tips For Losing Weight
Condoms
Sreenivasarao Vepachedu, August 31, 2000
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