Dr. John's Health Matters
Welcome to Dr. John's Health Matters blog.
The articles posted here are from various sources who are duly acknowledged. I would appreciate being immediately notified, if any copywritten material needs to be removed. This blog is not intended to replace the qualified advice of a licensed health practitioner. Readers should exercise their own judgment. Enjoy, subscribe, participate and tell others :)
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Chewing gum improves recovery from c-sections →
Sept 2, 2009 (Presstv.com)—Sugar-free chewing gums can help new mothers retrieve their normal bowel function following a cesarean section, a new study finds.
Similar to other abdominal surgeries, constipation and bloating due to slowed intestinal function is a regular complaint in women undergoing C-sections.
According to the study published in BJOG, chewing gum helps these women recover their normal bowel activity and shorten their hospital stay.
Chewing one stick of gum for 15 minutes every two hours sets off a nervous response, leading to the release of certain hormones that stimulate bowel activity.
Egyptian researchers concluded that chewing gum is a safe and inexpensive method to lower the complaint rate in women who have had a C-section.
PKH/HGH
Tags: chewing gum c-section new mother bowel function cesarean abdominal constipation bloating intestinal function bowel
To spray DEET or not to spray? →
Sept 2, 2009 (Cbc.ca)—DEET, the most common chemical ingredient in insect repellents, could be harmful to the central nervous system, new research suggests.
A report on the subject issued by researchers in France, in both Montpellier and Angers, was published on Aug. 5.
“We’ve found that DEET is not simply a behaviour-modifying chemical but also inhibits the activity of a key central nervous system enzyme, acetycholinesterase, in both insects and mammals,” said Vincent Corbeil, of the Institut de Recherche pour le Développement in Montpellier.
DEET — also known by its full name N, N-diethyl-methyl-meta-toluamide — has proven effective since its discovery in 1953 at warding off insects, including mosquitoes.
Used with insecticides
It does not kill bugs, but its vapours discourage them from landing or climbing on people. As well, the higher the DEET concentration in a repellent formula, the longer it provides protection. DEET is commonly used with insecticides, also.
About 200 million people use DEET every year, and it’s estimated that more than eight billion doses have been applied over the past 50 years, according to the journal BMC Biology.
“The findings question the safety of DEET, particularly in combination with other chemicals, and they highlight the importance of a multidisciplinary approach to the development of safer insect repellents for use in public health,” the French researchers wrote.
For full article, see link above.
Tags: DEET risk bug spray protection chemical toxin repellent acetycholinesterase nervous system
Melons can fight blood pressure →
Sept 2, 2009 (Presstv.com)—Following a diet rich in potassium-rich fruits and vegetables such as melons, commonly found in summer, can help lower the blood pressure.
Potassium chloride had long been used to lower blood pressure levels. A new study, however, finds any increase in potassium intake can also lead to similar results.
According to the study recently conducted at UT Southwestern Medical Center, the high potassium content of certain fruits including fresh melons can help athletes and those suffering from high blood pressure.
Scientists concluded that increasing potassium intake has the same effect as taking potassium chloride.
The US Department of Agriculture officials hence urged adults to get some 4,044 milligrams of potassium from food and beverages each day.
“Melons like cantaloupe and watermelon are particularly high in potassium,” said lead researcher Lona Sandon, adding that one fourth of a cantaloupe contains 800 to 900 milligrams of potassium, roughly 20 percent of the recommended daily value.
Two cups of watermelon contains nearly 10 percent of the recommended daily value.
Dried apricots, avocados, figs, kiwi, oranges, raisins, dates, beans, potatoes, tomatoes and even grapefruit are other good sources of potassium.
Tags: melon blood pressure hypertension vegetable potassium lower prevention treatment fruit cantaloupe watermelon apricot avocado fig kiwi orange raisin date bean potato tomato grapefruit
High-Carb, High-Fat Diets Better for Cognitive Performance →
September 1, 2009 (Medscape.com) — Diets high in carbohydrates or fat can lead to significantly better cognitive-performance and inflight-testing scores in pilots than diets high in protein, according to results reported in a poster presentation at the Military Health Research Forum (MHRF) 2009 in Kansas City, Missouri.
In addition, a high-carbohydrate diet helped study pilots sleep better, and a high-fat diet appeared to lead to significantly faster short-term memory.
“We started out thinking that the high-protein diet would lead to being the sharpest afterward,” said colead investigator Glenda Lindseth, RN, PhD, licensed registered dietician and professor of nursing at the University of North Dakota (UND) in Grand Forks. “But we were surprised by our findings that it was actually the high-carb or high-fat diets that were the best. Eating a diet that’s high in protein just isn’t going to help you perform optimally.”
“As a retired air-force pilot and a pilot for over 30 years, I believe this type of study is definitely needed,” said the other colead author, Paul Lindseth, PhD, professor of aviation and associate dean at the UND Odegard School of Aerospace Sciences. “This is important for pilots in the military and in combat situations, where they need to be sharp and alert.”
For full medical article, see link above.
Tags: high carb carbohydrate fat protein macronutrient diet nutrition cognitive performance testing score sleep short term memory performance alertness
Blueberry juice displays weight management benefits: Mouse study →
Sept 2, 2009 (Foodnavigator.com)—Drinking a modified blueberry juice may reduce food intake and body weight, and offer weight management potential, suggest findings from a new study with mice.
Canadian researchers report that mice prone to obesity, insulin resistance, diabetes and hypertension drinking the blueberry juice were protected against the development of glucose intolerance and diabetes mellitus.
The blueberry juice used in the study was not standard juice but had undergone a transformation using the Serratia vaccinii bacterium.
“Results of this study clearly show that biotransformed blueberry juice has strong anti-obesity and anti-diabetic potential,” said lead researcher Pierre Haddad, from the Université de Montréal.
“Biotransformed blueberry juice may represent a novel therapeutic agent, since it decreases hyperglycemia in diabetic mice and can protect young pre-diabetic mice from developing obesity and diabetes.”
Blueberries, nature’s only ‘blue’ food, are a rich source of polyphenols, potent antioxidants that include phenolics acids, tannins, flavonols and anthocyanins.
For full article, see link above.
Tags: blueberry juice antioxidant weightloss weight management obesity carotenoid insulin diabetes hypertension serratia vaccinii bacterium cholesterol cancer alzheimer prevention
Diesel Exhaust Is Linked To Cancer Development Via New Blood Vessel Growth →
Sept 2, 2009 (Sciencedaily.com)—Scientists have demonstrated that the link between diesel fume exposure and cancer lies in the ability of diesel exhaust to induce the growth of new blood vessels that serve as a food supply for solid tumors.
The researchers found that in both healthy and diseased animals, more new blood vessels sprouted in mice exposed to diesel exhaust than did in mice exposed to clean, filtered air. This suggests that previous illness isn’t required to make humans susceptible to the damaging effects of the diesel exhaust.
The tiny size of inhaled diesel particles, most less than 0.1 microns in diameter, potentially enables them to penetrate the human circulatory system, organs and tissues, meaning they can do this damage just about anywhere in the body. A micron is one millionth of a meter.
Diesel exhaust exposure levels in the study were designed to mimic the exposure people might experience while living in urban areas and commuting in heavy traffic. The levels were lower than or similar to those typically experienced by workers who use diesel-powered equipment, who tend to work in mines, on bridges and tunnels, along railroads, at loading docks, on farms and in vehicle maintenance garages, according to the U.S. Department of Labor.
“The message from our study is that exposure to diesel exhaust for just a short time period of two months could give even normal tissue the potential to develop a tumor,” said Qinghua Sun, senior author of the study and an assistant professor of environmental health sciences at Ohio State University.
“We need to raise public awareness so people give more thought to how they drive and how they live so they can pursue ways to protect themselves and improve their health. And we still have a lot of work to do to improve diesel engines so they generate fewer particles and exhaust that can be released into the ambient air.”
For full article, see link above.
Tags: disesel exhaust air damage risk cancer blood vessel tumor organ tissues circulatory system traffic environmental pollution
Waist-hip Ratio Better Than BMI For Gauging Obesity In Elderly, Study Finds →
Sept 2, 2009 (Sciencedaily.com)—Body mass index (BMI) readings may not be the best gauge of obesity in older adults, according to new research from UCLA endocrinologists and geriatricians. Instead, they say, the ratio of waist size to hip size may be a better indicator when it comes to those over 70.
In a new study published online in the peer-reviewed journal Annals of Epidemiology, researchers from the David Geffen School of Medicine at UCLA found that the waist-to-hip circumference ratio was a better yardstick for assessing obesity in high-functioning adults between the ages of 70 and 80, presumably because the physical changes that are part of the aging process alter the body proportions on which BMI is based.
“Basically, it isn’t BMI that matters in older adults — it’s waist size,” said Dr. Preethi Srikanthan, UCLA assistant professor of endocrinology and the study’s lead investigator. “Other studies have suggested that both waist size and BMI matter in young and middle-aged adults and that BMI may not be useful in older adults; this is one of the first studies to show that relative waist size does matter in older adults, even if BMI does not matter.”
For full article, see link above.
New iPhone App 'Outbreaks Near Me' Locates H1N1 (Swine Flu), Infectious Diseases →
Sept 2, 2009 (Sciencedaily.com)—A new iPhone application, created by researchers at Children’s Hospital Boston in collaboration with the MIT Media Lab, enables users to track and report outbreaks of infectious diseases, such as H1N1 (swine flu), on the ground in real time.
The application, “Outbreaks Near Me,” builds upon the mission and proven capability of HealthMap, an online resource that collects, filters, maps and disseminates information about emerging infectious diseases, and provides a new, contextualized view of a user’s specific location – pinpointing outbreaks that have been reported in the vicinity of the user and offering the opportunity to search for additional outbreak information by location or disease.
Additional functionality of Outbreaks Near Me is the ability to set alerts that will notify a user on their device or by e-mail when new outbreaks are reported in their proximity, or if a user enters a new area of activity.
“We hope individuals will find the new app to be a useful source of outbreak information – locally, nationally, and globally,” says HealthMap co-founder John Brownstein, PhD, assistant professor in the Children’s Hospital Informatics Program (CHIP). “As people are equipped with more knowledge and awareness of infectious disease, the hope is that they will become more involved and proactive about public health.”
For full article, see link above.
Tags: iPhone application swine flu H1N1 outbreak disease infectious location awareness
Weight Gain In Adulthood Associated With Prostate Cancer Risk; Patterns Differ By Ethnicity →
Sept 2, 2009 (Sciencedaily.com)—Body mass in younger and older adulthood, and weight gain between these periods of life, may influence a man’s risk for prostate cancer. This risk varies among different ethnic populations, according to results of a study in Cancer Epidemiology, Biomarkers & Prevention, a journal of the American Association for Cancer Research.
“The relationship of certain characteristics, such as body size, with cancer risk may vary across ethnic groups due to the combined influence of both genes and lifestyle,” said lead researcher Brenda Y. Hernandez, Ph.D., M.P.H., assistant professor at the Cancer Research Center of Hawaii, University of Hawaii.
Obesity is a risk factor for common cancers like colorectal cancer and breast cancer in post-menopausal women. However, the influence of body size on prostate cancer risk is not entirely understood. Hernandez and colleagues examined this relationship in a multiethnic population consisting of blacks, Japanese, Hispanics, Native Hawaiians and whites, and compared differences among age groups. They used the Multiethnic Cohort, a longitudinal study of men aged 45 to 75 years old established in Hawaii and California from 1993 to 1996.
For full article, see link above.
Tags: weight gain prostate cancer risk BMI body size ethnic group genes lifestyle obesity factor
People Who Don't Own A Car And Live Near Fast Food At Greater Risk For Obesity →
Sept 2, 2009 (Sciencedaily.com)—Living without a car in close proximity to fast food restaurants is associated with excess body mass index and weight gain, according to a University of Pittsburgh study available online and published in the September issue of the Journal of Urban Health. Indeed, adults in areas with high fast food concentration who didn’t have a car were as much as 12 pounds heavier than those who lived in neighborhoods that lacked such restaurants.
“Owning a car is generally associated with a more sedentary lifestyle and excess weight gain because people spend more time in their cars and less time walking,” said Sanae Inagami, M.D., study lead author and assistant professor, University of Pittsburgh School of Medicine. Yet, when Inagami and her colleagues looked at whether a high concentration of fast food restaurants impacted this association, they found that not owning a car in areas where fast food was more readily available increased the risk of obesity.
“Fast food may be specific to weight gain in particular populations and locations,” she said. “People who are less affluent don’t own cars and can’t go distances for healthier foods. As a result, they may end up opting for the lower-priced and high caloric foods available at fast food chains.”
For full article see link above.
Tags: car driving food fast fat obesity restaurant lifestyle sedentary weight gain walking risk overweight neighbourhood
Breast Cancer: Risk Increases For Smokers And Overweight Women →
Sept 1, 2009 (Sciencedaily.com)—A recent study published in the Journal of Cancer Epidemiology has reinforced the correlation between being overweight, smoking and breast cancer. What makes this study unique is how test subjects were not diagnosed for BRCA1 and BRCA2 gene mutations, which predispose women to breast cancer.
Instead, women with such gene mutations were excluded to allow researchers to concentrate on lifestyle factors such as smoking, exercise, nutrition and weight. All women analyzed in the study were direct ancestors of the first French colonists.
“To our knowledge, this is the first study conducted on a sample of women without BRCA1 and BRCA2 gene mutations, which are often found in French-Canadian women,” says lead researcher Vishnee Bissonauth, a graduate of the Université de Montréal’s Department of Nutrition and a researcher at the Sainte-Justine University Hospital Research Center.
For full article, see link above.
Tags: smoking breast cancer risk overweight obesity cigarette smoker gene mutation correlation
Tobacco Smoking May Increase Risk for Tuberculosis →
September 1, 2009 (Medscape.com)— Tobacco smoking is associated with a 2-fold increased risk for active tuberculosis, according to the results of a prospective Taiwan cohort study reported in the September 1 issue of the American Journal of Respiratory and Critical Care Medicine.
“Previous case-control studies and a small number of cohort studies in high-risk populations have found an association between tobacco and active tuberculosis, but no cohort studies have been conducted in the general population on this association to date,” write Hsien-Ho Lin, MD, ScD, from Harvard School of Public Health in Boston, Massachusetts, and colleagues.
The goal of the study was to evaluate the association between tobacco smoking and active tuberculosis in a general population cohort of 17,699 participants older than 12 years enrolled in the Taiwan National Health Interview Survey. An in-person interview at baseline determined smoking status and other covariates. During follow-up from 2001 to 2004, incident cases of active tuberculosis were identified with use of the National Health Insurance database. After adjustment for age, sex, alcohol intake, socioeconomic status, and other covariates, the association between smoking status and active tuberculosis was estimated with multivariate logistic regression.
During the 3.3 years of follow-up, there were 57 new cases of active tuberculosis. Current smoking was linked to an increased risk for active tuberculosis (adjusted odds ratio [OR], 1.94; 95% confidence interval, 1.01 - 3.73). Compared with patients older than 65 years, those younger than 65 years showed a stronger association between current smoking and the risk for active tuberculosis (adjusted OR, 3.04 vs 0.78; P for interaction = .036). There were significant dose-response associations for cigarettes per day (P for trend = .0036), years of smoking (P for trend = 0.023), and pack-years (P for trend = .0023).
“Tobacco smoking was associated with a twofold increased risk of active tuberculosis in a representative cohort of Taiwan’s population,” the study authors write. “The finding that smoking increases the risk of tuberculosis suggests that tobacco control be considered as an important component in the global effort to eliminate tuberculosis.”
For full medical article, see link above.
Caution on mix of cholesterol-lowering meds →
Sept 1, 2009 (Cbc.ca)—Combining a prescription cholesterol-lowering medication with omega-3 supplements may not be the best approach, a new review suggests.
Statins are medications that prevent the liver from producing cholesterol, which can help reduce the risk of heart attacks. Every year, Canadian doctors write more than 12 million prescriptions for statins, making them the most-prescribed drugs in the country. Omega-3’s are heart-healthy oils that some evidence suggests help reduce the risk of coronary disease.
In the Nov. 3 issue of the Annals of Internal Medicine, Dr. Mukul Sharma, medical director of the Regional Stroke Centre at the Ottawa Hospital, and his team reviewed five different cholesterol-lowering medications that can be combined as well as omega-3 supplements sold over the counter. They concluded there is little evidence to support mixing them.
Bad cholesterol increase
In one case, the researchers found taking prescription medication with omega-3 had the opposite effect.
“Your bad cholesterol, the LDL, actually goes up,” Sharma said. “There isn’t a benefit in terms of heart disease, stroke or mortality.”
Most cholesterol patients may be better off taking higher doses of one drug instead of multiple medications, since there may be less chance of side-effects and long-term problems developing, he said. People are also less likely to take their medications the more that are prescribed.
For full article, see link above.
Tags: cholesterol increase risk danger LDL prescription cardiovascular blood heart statin medication liver heart attack prevention coronary disease
Heart Suffers From Just a Few Whiffs of Smoke →
Sept 1, 2009 (Therapytimes.com)—Just a few whiffs of tobacco smoke or dirty air can have a profound negative impact on your heart’s health.
Study results released today by the American Heart Association suggest that exposure to even a small amount of smoke — whether it’s from your own cigarette or someone else’s — greatly increases your risk of dying from cardiovascular disease. The same goes for breathing in air polluted with carbon monoxide emissions.
“It doesn’t require extreme exposure to have significant cardiovascular effects. Even passive exposures to ambient air pollution and secondhand smoke contribute to significant increases in cardiovascular mortality,” study author C. Arden Pope III, PhD, says in a statement.
For full article, see link above.
Tags: heart cardiovascular risk disease smoke tobacco risk danger exposure cigarette breathing air pollution
How Cigarettes and Smoking Impact Your Pet’s Health →
Sept 1, 2009 (Mercola.com)—A growing body of research shows there are no safe levels of exposure to secondhand smoke — for humans or for animals. And one new study shows that nearly 30 percent of pet owners live with at least one smoker — a number far too high given the consequences of exposure to secondhand smoke (“SHS”)
An estimated 50,000 Americans lose their lives to secondhand smoke annually and 4 million youth (16 percent) are exposed to secondhand smoke in their homes. A number of studies have indicated that animals, too, face health risks when exposed to the toxins in secondhand smoke, from respiratory problems, allergies and even nasal and lung cancer in dogs and lymphoma in cats. In addition, the ASPCA, one of the largest animal rights groups in the U.S., lists tobacco smoke as a toxin that is dangerous to pets.
“Nicotine from secondhand smoke can have effects to the nervous systems of cats and dogs,” said Dr. Sharon Gwaltney-Brant, Medical Director of the ASPCA’s Animal Poison Control Center. “Environmental tobacco smoke has been shown to contain numerous cancer-causing compounds, making it hazardous for animals as well as humans.
In order to better protect dogs, cats or other pets, the foundation and ASPCA recommend that smokers—who often consider their domestic pets a part of the family—“take it outside” when they are smoking.
For full article, see link above.
