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Chocolate could prevent obesity and diabetes, study suggests


More than a third of US adults are obese and are, therefore, at higher risk of type 2 diabetes. But new research suggests a surprising prevention strategy for both conditions - eating chocolate.

In a mouse study, led by Andrew P. Neilson of the Department of Food Science and Technology at Virginia Polytechnic Institute and State University, researchers discovered that a certain antioxidant in cocoa - the main ingredient in chocolate - prevented mice from gaining weight and lowered their blood sugar levels.

This is not the only study to suggest that consuming chocolate can prevent such health conditions.

Earlier this year, Medical News Today reported on a study claiming that chocolate, as well as wine and berries, protects against type 2 diabetes, while other research found that teens who eat lots of chocolate tend to be slimmer.

Such studies claim that the reason chocolate may have these health benefits is because of the flavanols it contains. These are types of antioxidants.

But the researchers of this most recent study say that not all flavanols are the same. In fact, cocoa has several different types.
Dark chocolate
Good news for chocolate lovers: a certain flavanol in cocoa may help prevent obesity and type 2 diabetes.

In their study, published in the Journal of Agricultural Food and Chemistry, the investigators set out to determine exactly which flavanol may be responsible for preventing weight gain and lowering blood glucose levels.

For the research, the investigators assigned mice to one of six different diets for 12 weeks.

These consisted of high- and low-fat diets, and high-fat diets supplemented with either monomeric, oligomeric or polymeric procyandins (PCs) - types of flavanols. Mice were given 25 milligrams of these flavanols each day for every kilogram of their body weight (25 mg/kg).
Oligomeric procyandins most effective

The research team found that a high-fat diet supplemented with oligomeric PCs was the most effective for maintaining weight of the mice and improving glucose tolerance - a factor that could help prevent type 2 diabetes.

Commenting on the findings, the researchers say:

    "Oligomeric PCs appear to possess the greatest antiobesity and antidiabetic bioactivities of the flavanols in cocoa, particularly at the low doses employed for the present study.

    Additional studies of prolonged feeding of flavanol fractions in vivo are needed to further identify the fractions with the highest bioactivities and, therefore, the greatest potential for translation to human clinical applications at reasonable doses."

The investigators point out that the doses of flavanols used in this study are significantly lower than doses used in past research and are more feasible when translated into flavanol levels for human consumption.

"Therefore, our data suggest that moderate doses of cocoa flavanols or cocoa powder have the potential to be more effective in human clinical trials than previously thought," they add.

According to previous research, the health benefits of chocolate may reach further than decreasing the likelihood of obesity and type 2 diabetes. Medical News Today recently reported on a study claiming that eating 70 g of dark chocolate every day could reduce the risk of atherosclerosis - the thickening and hardening of the arteries.

But interestingly, this study did not attribute this benefit to the flavanols that chocolate contains. Study participants ate either regular dark chocolate or chocolate with added flavanols. Both types of chocolate had the same effect.

"We provide a more complete picture of the impact of chocolate consumption in vascular health and show that increasing flavanol content has no added beneficial effect on vascular health," says study researcher Prof. Diederik Esser, of the Top Institute Food and Nutrition and the Division of Human Nutrition at Wageningen University, both in the Netherlands.

Other research claims that hot chocolate could help prevent memory decline. Again, the researchers say this finding was not down to flavanols.

Morning rays keep off pounds


A surprising new strategy for managing your weight? Bright morning light.

A new Northwestern Medicine® study reports the timing, intensity and duration of your light exposure during the day is linked to your weight -- the first time this has been shown.

People who had most of their daily exposure to even moderately bright light in the morning had a significantly lower body mass index (BMI) than those who had most of their light exposure later in the day, the study found. (BMI is a ratio calculated from a person's weight and height.)

"The earlier this light exposure occurred during the day, the lower individuals' body mass index," said co-lead author Kathryn Reid, research associate professor of neurology at Northwestern University Feinberg School of Medicine. "The later the hour of moderately bright light exposure, the higher a person's BMI."

The influence of morning light exposure on body weight was independent of an individual's physical activity level, caloric intake, sleep timing, age or season. It accounted for about 20 percent of a person's BMI.

"Light is the most potent agent to synchronize your internal body clock that regulates circadian rhythms, which in turn also regulate energy balance," said study senior author Phyllis C. Zee, M.D. "The message is that you should get more bright light between 8 a.m. and noon." About 20 to 30 minutes of morning light is enough to affect BMI.

Zee is the Benjamin and Virginia T. Boshes Professor of Neurology and director of the Northwestern Medicine Sleep and Circadian Rhythms Research Program at Northwestern University Feinberg School of Medicine. She also is a neurologist at Northwestern Memorial Hospital.

"If a person doesn't get sufficient light at the appropriate time of day, it could de-synchronize your internal body clock, which is known to alter metabolism and can lead to weight gain," Zee said. The exact mechanism of how light affects body fat requires further research, she noted.

The study will be published April 2 in the journal PLOS ONE. Giovanni Santostasi, a research fellow in neurology at Feinberg, also is a co-lead author.

What's the Magic Number for Low BMI?

Many people do not get enough natural light in the morning, Zee said, because the American lifestyle is predominantly indoors. We also work in poorly lit environments, usually about 200 to 300 lux. In the study, 500 lux was "the magic number" or minimum threshold for having a lower BMI. Even on a cloudy day, outdoor light is more than 1,000 lux of brightness. It is difficult to achieve this light level with usual indoor lighting, the scientists noted.

Light May Be Next Frontier for Weight Loss

"Light is a modifiable factor with the potential to be used in weight management programs," Reid said. "Just like people are trying to get more sleep to help them lose weight, perhaps manipulating light is another way to lose weight."

Santostasi, a physicist by training, developed a new measure for the study that integrates the timing, duration and intensity of light exposure into a single number called mean light timing or MLiT.

He searched for a correlation between light exposure timing, duration or intensity in the study raw data, but none of those factors individually were associated with BMI. It was only when he began combining parameters, that he saw "the strong signal" when all three were examined together.

"I saw that what seemed to be most associated with body mass index was not just how much light you receive but when you get it and for how long," Santostasi said.

The study included 54 participants (26 males, 28 females), an average age of 30. They wore a wrist actigraphy monitor that measured their light exposure and sleep parameters for seven days in normal-living conditions. Their caloric intake was determined from seven days of food logs.

Befriend Your Body Clock -- Get Morning Light

The finding emphasizes the importance of "circadian health" in which exposure to light and dark is synchronized with your internal body clock. "We focus on how too much light at night is bad; it's also bad not to get enough light at the appropriate time during the day," Zee said.

As part of a healthy lifestyle, people should be encouraged to get more appropriate exposure to light. Workplaces and schools should have windows. Employees should be encouraged to go outside for lunch or breaks, and indoor lighting should be improved in the school and workplace "This is something we could institute early on in our schools to prevent obesity on a larger scale," Zee said.

While duration and timing of sleep was not linked to the results, "owl" chronotypes, who stay up later and sleep later, would be a population affected by later light exposure. But even "larks," those who wake early, would be affected by lack of early light if they stayed inside in the morning.

While the study wasn't designed to examine how light exposure affects body fat, previous research at Northwestern and elsewhere shows light plays a role in regulating metabolism, hunger and satiety.


Source: sciencedaily.com

5 Reasons Your Weight Is Stuck


Stuck in a weight-loss rut? Turns out you're not alone. Those last 5-10 pounds are often the hardest to lose. MyFitnessPal – the largest digital health company with more than 50 million users -- surveyed its users to find out what's keeping them from reaching their ultimate goal. Turns out there's five primary reasons those last few pounds seems to stick around longer than the ones before.

Elle Penner, MyFitnessPal's registered dietician, came up with tips to combat each and every one of those pitfalls that's keeping the number on your scale from going down. Click through the next few pages to find out how to get out of the rut and back to losing weight.

Strong sweet tooth

54 percent of MyFitnessPal users say dessert is a major obstacle to weight loss. Penner said it's important to keep a tally of miniature treats. 3-4 "snack-size" treats and a handful of M&Ms can quickly add up to the fat and calories of full-size desserts. "Even if you don't have time to track every morsel of food you eat throughout the day, a little snacking insight can go a long way in preventing sneaky weight gain."

People hate veggies.

Nearly 1 in 10 people said not eating vegetables is the culprit. Try to get your fruit and veggie servings in early in the day, said Penner. "The oh-so-popular green smoothie is the perfect way to get in a serving of veggies before you even get to the office. Try adding low-fat yogurt, milk or nut butter. It will up the protein and help keep you satisfied and focused throughout the morning."

Carbs are the devil.

47 percent say love for bread and pasta keeps them off-track So, Penner said, consider taking a temporary weight loss vacation. Put it on the back burner for a week or so, just aim not to gain any weight, and come back with a fresh mind to reset your habits, she said. "When life gets really busy or stressful, avoiding additional weight gain is an achievement in itself," she said. " Set yourself up for success and pick back up on your weight loss efforts when you have the time and energy to dedicate to doing it healthfully."

Emotional eating.

Turns out more than half of us blame binges on mood swings. Penner said getting new workout gear could help. It sounds superficial, but nice workout gear really can make you feel better during a workout, and be an incentive to get you moving. "Rather than rewarding yourself with an indulgent meal when you hit a new health goal," she said, "invest in your next one by adding a new item to your workout wardrobe."


No me time.

More than 20 percent of users report they don't have the time to cook or exercise. Penner said to stock the pantry. "When they're on sale, stock up on canned beans and tomatoes, herbs and spices, nuts and whole grains like quinoa, rolled oats and whole wheat pasta. Having a stash of healthy pantry staples will save time and money." Instead of buying packaged convenience foods, filling your pantry with these healthy staples will give you a solid foundation for preparing more nutritious meals at home.

Source:  abcnews.go.com