Thứ Ba, 15 tháng 3, 2011

Why Mango Should Be In Your Diet List?

Who wants to be overweight? If this question is asked, it is quite sure that no one would raise the hand and say yes. The reason is simple. Overweight and obesity would bring along many undesired medical disorders including heart disease, high blood pressure (hypertension), stroke and Type-2 diabetes.

Overweight people, with a few exceptions, would try every means to lose the extra weight they have. They will either adopt weight management program that incorporates exercise and diet or take some products that could help lose weight.

Among the many weight-loss products available, researchers from Cameroon's University of Yaounde found a product, originated from West Africa, which could help overweight or obese people lose weight and stabilize cholesterol levels. It is a fruit called irvingia gabonensis, also known as African mango. Their findings were published on March 25, 2009 in ‘Lipids in Health and Disease’.

In the study, a test group of 102 overweight adults was given either extracts of the fruit or a placebo 2 times a day over a period of 10 weeks. The individuals’ diet and levels of activity were not changed.

At the end of 10 weeks, people who consumed fruit extract had a significant weight loss, a total of 12.5 kilos (or 28 pounds), while those who were in the placebo group showed no change in their weight. Participants taking the extract also had reduction in LDL (bad) cholesterol and nominal improvements in their blood sugar levels.

According to the researchers, the fruit extract helps bodies become more sensitive to lepitin, which is a hormone excreted by the body to control fat storage, especially in the midsection. As many overweight or obese people are resistant to lepitin, the fruit extract helps their bodies to overcome such resistance thus resulting in weight loss.

While some side effects like excess gas, sleep problems and headaches were reported among some participants in the fruit extract group, such side effects were also reported similarly in rate among participants in the placebo group.

Though scientists have suspected that Africa mango has the ability to help trim excess weight, this was the very first clinical study showing its true effects. It is hoped that the new findings would inspire some larger clinical studies to be implemented to further confirm the benefits derived.

Thứ Sáu, 11 tháng 3, 2011

A New Risk Factor for High Cholesterol!

Bad cholesterol refers low-density lipoprotein, or LDL. A person with high LDL is at high risk of developing heart disease, hypertension (high blood pressure), and stroke.

High fat diet and lack of physical activity could be 2 of the common causes for getting high LDL. But United States researchers from West Virginia University recently found that chemicals used to make non-stick coatings on cookware and to waterproof fabrics might increase cholesterol levels in children. Their findings appeared on September 6, 2010 in the Archives of Pediatrics & Adolescent Medicine.

In the study, children with highest levels of these chemicals in their blood had higher levels of total cholesterol and LDL, compared with children with lower readings.

The 2 chemicals studied were perfluorooctanoic acid (PFOA) and perfluorooctanesulfonate (PFOS). They enter into people through air and occupational exposure, breast milk, cord blood, drinking water, dust, food packaging, and microwave popcorn.

Studies in animals had suggested that perfluoroalkyl acid, which is a known neurotoxin, could affect the liver ad so result in changes in cholesterol levels. Perfluoroalkyl acid could interfere with brain development, which leaves its mark on later behavioral functions such as cognitive performance.

The cholesterol levels in blood samples, taken from more than 12,000 children in the mid-Ohio River who had PFOA in their drinking water, were examined. These children and teens had more PFOA in their bodies than the national average, and a PFOS concentration about the same as the national average.

After analyzing the data, it was found that children and teens with the highest PFOA concentration had total cholesterol levels that were 4.6 points higher and LDL levels that were 3.8 points higher than those with the lowest PFOA levels.

Nevertheless, the researchers admitted that their findings only indicated there is a link between the compounds and higher cholesterol. They suggested more studies should be carried out to prove chemical exposure was the cause.

Thứ Ba, 8 tháng 3, 2011

How Fast Can Stroke Cause Brain Damage?

A stroke, sometimes also known as brain attack, occurs when there is an interruption of blood supply to any part of the brain because of blockage or burst in one of the blood vessels in the brain. If the brain cannot get blood and oxygen, the brain cells could die and permanent damage would be caused within a relatively short period.

Stroke is one of the top killer s in the developed countries. In Canada, stroke ranks the fourth leading cause of death, affecting as many as 50,000 people and killing 16,000 every year. Risk factors for stroke include alcoholism, diabetes, high cholesterol, overweight or obesity, physical inactivity, smoking and stress.

So how fast can stroke damage the brain?

Common public perception believes that all strokes can be medically treated within 3 hours, but scientists from the University of British Columbia in this Western Canadian city reported otherwise. Their study, which was funded by the Heart and Stroke Foundation of Canada, found that stroke could cause brain damage within 3 minutes.

Generally, stroke can be categorized into 2 types: ischemic and hemorrhagic. Ischemic strokes are those caused by interruption of the blood supply, while hemorrhagic strokes are those that result from rupture of a blood vessel or an abnormal vascular structure.

About 80 percent of stroke patients suffer ischemic stroke, which can usually be treated by clot-busting medications, provided if they could be admitted to the hospital within 3 hours. In reality, not every stroke patient is a candidate for clot-busting drugs.

Based on the results obtained from animal experiments performed, the scientists declared that brain could be damaged within 3 minutes. Such 3-minute window does not give people sufficient time to even call for help.

Preventive measures, therefore, are urgently required to tackle structural changes that happen very early on. People just need to manage risk factors and change their lifestyle to prevent getting a stroke, instead of relying on treatment when stroke strikes them.

Thứ Sáu, 4 tháng 3, 2011

Should Obese Be Called Fat?

Obesity epidemic has been a worldwide issue not only in developed and wealthy countries but also among many developing countries. For example, the United Kingdom (UK) has one of the highest obesity rates in Europe, with the level steadily increased over the last 10 years. According to the Department of Health in UK, almost 25 percent of adults and 14 percent of children were classified as obese in 2008.

An obese is a highly possible victim of many chronic diseases including Type-2 diabetes, high blood pressure (hypertension), heart cholesterol, heart disease, atherosclerosis, stroke and certain types of cancer.

Authorities and health community have utilized all ways and means to curb the growing obesity epidemic. Recently, a government official in Europe has even suggested to call people who are obese as “fat” to motivate them to lose weight. The reason quoted by this official is that calling an obese “fat” could encourage this person to take personal responsibility for his or her lifestyles.

Most doctors and health workers tend not to use the word “fat” as they feel this will stigmatize people who are overweight or obese. However, this official believes that people will only start paying attention when they are called “fat”, and not “obese”. Patients will start doing losing weight only when they have true information about themselves.

Some doctors agreed with the official as they felt doctors need to be honest with their patients rather than telling them what they love to hear. To some doctors, the term “obese” seems to medicalize the state, and makes it a third person issue. Sometimes, for the sake of patients, doctors just need to be more brutal and honest.

Nevertheless, there were objection from other medical professionals against what the official advocated. They felt that people just do not want to be offensive. Calling a person “fat” will more likely to disgrace and harm that person. They also pointed out that obesity is something that happens to people rather than something they are. As such, they suggested using the term “obesity” to encourage patients to think about the condition in a different way.

While the approach might be different, the aim is still the same: to encourage the patient to lose weight so that he or she can be healthy. The best approach, perhaps, still depends on the relationship the doctor has with the patient and the doctor should make their judgment on a patient-by-patient basis.

Thứ Ba, 1 tháng 3, 2011

Can Smoking Relieve Stress?

Numerous studies have shown that smoking and secondhand smoke are linked to many medical disorders including cancer, heart disease, hypertension (high blood pressure), and stroke. So quitting smoking would certainly be beneficial to both smokers and people around them.

Interestingly, many smokers have claimed that lighting up a cigarette can actually help them reduce the stress they have. This is probably a fairly good reason for millions of smokers to light up their cigarettes again even after quitting.

But studies have found otherwise. In reality, smoking has the entirely different effect. Instead of reduced, the long-term stress levels will be raised among smokers. In fact, smokers can have their stress relieved only when they quit smoking.

In a paper published on June 7, 2010 in the journal “Addiction”, researchers from the London School of Medicine and Dentistry found that smokers who stopped lighting up cigarettes had a significant larger reduction in perceived stress.

A total of 469 people, who attempted to quit smoking after being hospitalized for heart disease, were examined. At the outset, the participants had similar stress levels and about 85 percent of these people generally believed that smoking helped them cope with the stress they had.

After a year, 41 percent of the participants managed to quit smoking completely and their perceived stress levels were reduced by about 20 percent, whereas patients who continue smoking showed little change in their perceived stress levels.

Obviously, the findings supported the theory that smoking can actually contribute to stress among some people. But why do smokers still think that lighting up a cigarette could help them relieve stress?

According to researchers, when smokers are refrained from smoking, they tend to feel more and more edgy, irritable and uncomfortable as the period lengthens. A cigarette would more or less help them get through the stressful state. This is probably the main reason smokers think that smoking help them reduce stress.

Therefore, smoking can relieve stress is actually a myth, at least in the long term.

Thứ Sáu, 25 tháng 2, 2011

Which Weight Loss Method Is Most Effective In the Long Run?

More and more people are aware of the negative consequences that overweight and obesity will bring to them. Therefore, people who are overweight and obese will use whatever weight loss methods and tactics to help them getting rid of the extra weight they have. Unfortunately, not many of them would succeed in keeping their weight off in the long run.

Some health experts believe that losing lot of weight quickly at the outset would make the dieters gain most of the weight back. Hence, overweight and obese patients have often been encouraged losing weight in small increments. But others found this more of a myth. In fact, scientists have found that no matter how much weight people initially lose, they seem to gain back a similar percentage of that weight over the next year.

According to a new study published online in ‘Obesity Reviews’ in March 2010, people should lose a high amount of weight initially if they were concerned about the long-term weight. The findings were also presented on July 12, 2010 at the International Congress on Obesity in Stockholm, Sweden.

Researchers from the National Institute for Public Health and the Environment in the Netherlands analyzed data from 12 different weight-loss studies covering almost 1,000 overweight and obese participants, who went through an intensive weight-loss program comprising of exercise and nutrition guidance. Duration of all the weight-loss programs differed; each lasted between 10 weeks and one and a half years.

Each participant was weighed at the start and end of the weight-loss program, and again at least one year after completing the program. On average, participant who began at 209 pounds lost about 20 pounds over the duration of the program. One year later, participants were found to gain back an average of about half of the weight initially lost. This indicated that the participants who had initially lost the most weight also ended up with the best long-term results.

Nevertheless, the researchers cautioned people not to drop their weights at unsafe levels. 1 or 2 pounds a week should still be desirable for people wishing to lose weight. Meanwhile, they also suggested that future studies should follow participants for longer than one year after their initial weight loss to better understand the long-term effect of that initial weight loss.

Thứ Ba, 22 tháng 2, 2011

What Cause The Diabetes Epidemic in Southeast Asia?

Junk food refers to food that is high in calories but low in nutritional content, according to the definition by Merriam-Webster. For decades, health experts have blamed junk food for causing obesity epidemic, especially among the youngsters.

On July 7, 2010, Australian and Vietnamese researchers from Sydney's Garvan Institute of Medical Research warned that the growing popularity of Western junk food is the culprit responding for the diabetes boom across Southeast Asia.

The study showed that about 11 percent of men and 12 percent of women in Vietnam’s Ho Chi Minh City had Type-2 diabetes without even realizing it, in addition to the 4 percent of people who had already been diagnosed with diabetes. Their findings were based on testing a random sample of more than 2,000 people including 721 men and 1,421 women.

Being the most common form of diabetes, Type-2 diabetes is a medical disorder that is caused by high level of sugar and fat in the diet and inadequate exercise. If a patient with Type-2 diabetes were not getting timely treatment, he or she would face a higher risk of developing many complications including heart disease, kidney failure, limb amputation and vision loss.

In recent years, dietary patterns have been altered dramatically in Vietnam, particularly in cities that have become more westernized. Fast food outlets are available everywhere. This is rather sad because while developing countries are facing hunger and poverty, they are also affected by Western lifestyle diseases without adequate health resources to deal with.

Since similar study carried out in Thailand supported the link, the researchers are confident that their findings could be extrapolated to other parts of Southeast Asia including Cambodia, Laos, Malaysia and Singapore.

Meanwhile, the researchers have also developed a simple risk assessment for diabetes, using blood pressure and waist-to-hip ratio. Hopefully, this can help doctors detect those who are most likely to have diabetes.