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December  2007

Medical screening may do more harm than good

 

    Prof. Nicholas Wald, director of Wolfson Institute of Preventive Medicine, London says hi-tech medical screening that promises to detect early symptoms of cancer and cardiovascular diseases may do more harm than good.

   “Screening is usually a weak means of providing reassurance, because it generally misses most cases of the disease for which it is carried out and there is always some harm which is only acceptable if there is also some benefit,” he says.

      Screening is different from diagnosis in the sense that diagnosis is performed only when there is a clinical indication of disease, whereas screening is carried out without any indication of disease. Mammography to detect breast cancer, Pap smear to detect cervical cancer, Mole assessment to detect skin cancer, Virtual colonoscopy to detect bowel cancer, CT scan to look inside the head, Body scan to look inside the body are some of the widely performed medical screening tests.

     What are the adverse effects of unnecessary screening tests? Anxiety & stress caused and unnecessary investigation & treatment when the result is false positive (the test shows positive even though there is no disease), a false sense of security and delay in treating the disease when the result is false negative (the test shows negative missing out the disease), adverse effects of radiation as scans deliver a hefty dose of radiation and an avoidable waste of medical resources.

     It would be wise to follow the World Health Organisation’s first and foremost principle of screening, ‘The condition should be an important health problem’, before deciding to ‘look into the body’.

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Lemon juice multiplies green tea's health benefits

      

       Studies have shown that catechins (pronounced ka-tay-kin), the naturally occurring antioxidants found in tea, is able to detoxify toxic chemicals, inhibit cancer cell activity, stimulate production of immune-strengthening enzymes and reduce the risk of cancer, heart attack and stroke. But the problem is that catechins are relatively unstable in the intestines and less than 20 percent remains after digestion.

      Researcher Mario Ferruzzi, assistant professor of food science at Purdue University found that adding citrus juice to freshly brewed tea increased recovered catechin levels by more than five times. Lemon juice caused 80 percent of tea’s catechins to remain. Following lemon, were orange, lime and grape fruit juices, in terms of stabilizing power.

   “If you want more out of your green tea, add some citrus juice to your cup after brewing or pick a ready-to-drink product formulated with ascorbic acid,” suggests Ferruzzi. Although his study examined only green tea, Ferruzzi said he believed that some of the results also could apply to black tea, which is produced by fermenting green tea.

   Those who prefer black tea’s flavour to that of green tea must remember that catechin levels in black tea is much lower that the catechin levels in green tea.

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The fertility diet

 

    Women, who followed a combination of five or more lifestyle factors, including changing specific aspects of their diets, experienced more than 80 percent less relative risk of infertility due to ovulatory disorders, compared to women who engaged in none of the factors, according to researchers at the Harvard School of Public Health, who studied a group of 17,544 married women.

     Making the right dietary choices and including the right amount of physical activity may make a large difference in the probability of becoming fertile, according to Dr. Jorge Chavarro and Dr. Walter Willett of HSPH Department of Nutrition.

  The researchers devised a scoring system based on the following dietary and lifestyle factors.

     The ration of mono unsaturated fats to transfats in the diet.        Protein (animal and vegetable) consumption.

      Carbohydrates consumption.

      Dairy consumption.

      Iron consumption.

      Multi Vitamin use.

      Body Mass Index.

      Physical activity.

   The researchers assigned a fertility diet score of one to give points. The higher the score, the lower the risk of infertility associated with ovulatory disorders.

   The researchers found that the women with the highest fertility diet scores had the following common factors.

      Ate less transfats.

      Ate less sugar from carbohydrates.

      Consumed more protein from vegetable than from animals.         Ate more fibre and iron.

      Took more multivitamins.

      Had a lower Body Mass Index.

      Exercised for longer periods.

      Consumed more high-fat dairy products.

      Consumed less low-fat dairy products.

   The relationship between a higher fertility diet score and lesser risk of infertility was similar for different subgroups of women regardless of age and whether or not they had been pregnant in the past.

   “We analyzed what happens if you follow one, two, three, four or more different factors. What we found was that as women started following more of these recommendations, their risk of infertility dropped substantially for each of the dietary and lifestyle strategies undertaken,” said Chavarro.

 

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Secrets of health skin and hair

   

     Dermatologists, who recently met at the American Academy of Dermatology’s SKIN Academy, shared their secrets of maintaining healthy skin and hair

       “Unless you have really oily skin, because you are a teenager or work with oils or gases, you do not need soap to get yourself clean. Pure water does the job to get you clean. You need to use soap only on your face, under your arms and in the groin area. As you get older, the use of soap on the rest of your body can unnecessarily dry your skin,” says Brian B. Adams, MD, associate professor of dermatology, University of Cincinnati.

    “When it comes to hair care, less is more. Using unnecessary products or subjecting the hair to repeated procedures such as perming, colouring, waving and straightening can damage the hair and lead to breakage,” says Zoe D.Draelos, MD, who practises at High Point.

     “What you apply to your skin helps give it a healthy, radiant glow, but remember what you put into your body is just as important. A balanced diet rich in vitamins and antioxidants can make a real difference in the appearance of your skin,” says Susan Taylor, MD, assistant clinical professor of dermatology, Columbia University.

    “Quit smoking or better yet don’t even start. More and more young people are smoking and doing so to relieve stress, but it’s bad for your skin and causes wrinkles. Deep set wrinkles will appear around your mouth from puckering, your skin will be dehydrated and dull and you may experience premature ageing,” says Flor Mayoral, MD, clinical instructor, department of dermatology and cutaneous surgery, Miller School of Medicine, University of Miami.

 

 

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Antimicrobial use in animal feed can affect human health

   Johns Hopkins University researchers found that poultry workers in the United States are 32 times more likely to carry the drug-resistant E.Coli bacteria than others outside the poultry industry. The study results are published in the 2007 December edition of Environmental Health Perspectives.

    The use of antimicrobials in industrial food animal production has been growing steadily. “Some estimates indicate that well over half of the antimicrobial drugs produced in the Unived States is used in food animjal production,” said the study’s lead author Lance B. Proce, who is a scientific advisor to the Johns Hoplins Center for  a Livable Future.

    Antimicrobials are applied to food animals, in sub- therapeutic doses as growth promoters as they improve feed conversion (meat to feed ration) and reduce waste output. Though, initially antibiotics were given to animals to treat diseases, the accidental finding that adding the antibiotic streptomycin to chicken feed increased the growth rate of chickens led to the wide use of adding antibiotics to animal feed.

   The first finding that people were infected after eating hamburger originating from South Dakota beef cattle that was fed the antibiotic chlortetracycline for growth promotion, rang the first alarm bells. More recent studies have found that animals that are fed antimicrobial drugs carry disease-resistant bacteria and these bacteria can be transferred to humans though direct contact with either animals or with animal meat.

     Until such time, the Governments ban the use of antibiotics in animal feed, people must abstain from consuming the meat of animals that are fed antibiotics.

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Side-effects of rapid weight loss diets

 

 

     Arizona State University researchers Carol Johnston and Pamela Swan from the department of Nutrition and the department of Exercise & Wellness, who studied the popular rapid weight loss diets, found that many biomarkers were affected negatively by the severely low-carbohydrate intake.

     The downside of severely low carbohydrates intake is that dieters go into what is called ketosis (inefficiency of the body to oxidise fat),” says Carol Johnston. Some popular diets such as Atkins diet, entails very low carbohydrate – less than 20 grams daily. Diets that severely restrict carbohydrates, particularly potassium-rich fruits and vegetables, may have deleterious effects on bones.

     Another study found that for those individuals who are taking in an extremely low amount of carbohydrates, intense exercise is harming their bodies more than it is helping.

   “120 grams of carbohydrates is enough for an average person who does moderate exercise but endurance athletes should eat more carbs, especially for long bouts of exercise like a marathon,” according to Pamela Swan.   

   Carbohydrates are grouped into two main categories, simple carbohydrates found in fruits such as banana, apple, dates & honey and complex carbohydrates found in vegetables such as beans, cabbage & cauliflower, grains such as brown rice, whole wheat & oats and dairy products such as yoghurt & milk.

 

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Plastic beauty through cosmetic surgery

 

   Today the perception of beauty is based in images of models, who have been surgically made to look beautiful. Many people feel inadequate of their natural looks.

     Breast uplift is the most popular cosmetic surgery among women and nose job is the most popular cosmetic surgery among men. Among the non-surgical cosmetic procedures, botox is used to smooth forehead lines. And collagen is used to improve the appearance of wrinkles.

     People who plan cosmetic surgery must be aware that certain cosmetic procedures need not be carried out by medically qualified personnel and could lead to side-effects that cannot be reversed or could only be reversed at a great cost and suffering. “If things go wrong, some patients could be left scarred physically or psychologically for life,” said Dr. Andrew Wallance-owen, Chairman of the Independent Healthcare Advisory Services’ Working Group on Cosmetic Surgery.

     “Some people spend more time choosing their bathroom tiles than they do choosing their surgeon,”   said Dr. Rajiv Grover a consultant plastic surgeon and Secretary of the British Association of Aesthetic Plastic Surgeons. People considering cosmetic surgery must consider the potential dangers and side-effects and select the surgeons with care, warned Dr. Rajiv Grover.

 

     

 

 

 

In This Issue

1. Medical screening may do more harm than good

2. Lemon juice multiplies green tea's health benefits

3. The fertility diet

 4. Secrets of health skin and hair

5. Antimicrobial use in animal feed can affect human health

6. Side-effects of rapid weight loss diets

7. Plastic beauty through cosmetic surgery

 

 

 

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