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Can Krill Help You Lose Weight?

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Omega-3s sourced from krill are more effective than fish oil in combating some metabolic symptoms, including raised fat levels in the heart and liver and violent mood swings.

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The study concludes that while both fish-sourced and krill-sourced omega-3 fats are effective in reducing fat levels, krill is more effective.

The researchers said the mechanisms of why this was the case had not been made clear in the study, but suggested long-chain polyunsaturated fatty acids (LCPUFAs) may reduce activity in the endocannabinoid system. The endocannabinoid system consists of a group of neuromodulatory lipids and receptors that influence appetite, pain sensation, mood and memory.

The researchers found that, when parameters associated with obesity were considered, krill oil reduced rat heart fat levels by 42 percent, compared to 2 percent for fish oils.

In the liver, a 60 percent reduction was observed for krill, 38 percent for fish oil. Fat build up in the liver can lead to insulin insensitivity and cause type 2 diabetes

Resources:
NutraIngredients.com June 30, 2009
Journal of Nutrition June 23, 2009

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Two Dietary Oils Gives 2-Sets of Benefit

A study comparing how two common dietary oil supplements — safflower oil and conjugated linoleic acid (CLA) — affect body composition suggests that both oils can lower body fat in obese postmenopausal women with type 2 diabetes.
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In the study, 16 weeks of supplementation with safflower oil reduced fat in the trunk area, lowered blood sugar and increased muscle tissue in the participants.

Conjugated linoleic acid supplementation for the same length of time, on the other hand, reduced total body fat and lowered the women’s body mass index (BMI), a common health measure of weight relative to height.

All of the women in the study took one oil for 16 weeks, followed by the other oil for an equal amount of time.

Reources:

Eurekalert July 7, 2009
American Journal of Clinical Nutrition June 17, 2009

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The Pill that Reduces Body Fat by Half in a Week

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Tests on mice have shown that the drug could decrease body weight by a quarter and their fat content by 42 per cent after seven days.
After a month, the weight of the mice had been reduced by 28 per cent and their fat mass by 63 per cent.
But experts warned that it could take a decade for the potential wonder drug to be developed for use by patients.
The researchers, whose findings are published online in Nature Chemical Biology, say further research is needed before the drug is tested on humans.
But they say the results point to a new approach for the treatment of obesity and adult-onset diabetes.
The drug is an artificial hormone that regulates glucose metabolism.
Previous studies have found this substance can suppress appetite or lead to weight loss by increasing the body’s calorie usage.
Dr Richard DiMarchi and colleagues at Indiana University in the U.S. created the synthetic hormone and carried out the trials on mice.
He said: ‘Obesity and its associated consequences, including adult-onset diabetes, remain a primary health and economic threat for modern societies.’
At the moment surgical interventions such as gastric bypass remain the only therapeutic options with the potential for a cure.
Dr DiMarchi said acute glucagon administration reduces food intake in animals and in humans, and may also promote weight loss.
He added: ‘Pharmacological treatment of obesity using single agents has limited efficacy or presents risk for serious adverse effects.
‘No single agent has proven to be capable of reducing body weight more than 5 to 10 per cent in the obese population.
‘Combination therapies using multiple drugs simultaneously may represent the preferred pharmaceutical approach to treat obesity, and there is ample precedent for combination therapy in treatment of chronic diseases.

‘Here we present results that prove the principle that single molecules can be designed that are capable of simultaneously activating more than one mechanism to safely normalise body weight.’

Last night, he said it would be ten years before the drug is available and tests needed to be completed on humans.
Cambridge University professor of clinical biochemistry Stephen O’Rahilly said: ‘It is important that these are demonstrated to be effective and safe in animal models before going forward with trials in humans.’
He added: ‘Many promising drugs fall down when tried in humans either because they don’t work sufficiently well or because of side effects.
‘It is far too early to tell whether this molecule will be one of the exceptions and become a safe and effective treatment for obesity in humans.’
But he concluded: ‘I hold out considerable hope for the discovery of safe and effective anti-obesity therapies.’
Professor O’Rahilly said that patients being treated with the drug could take one pill a day, or an injection.

Source: Mail Online. July 14th. 2009

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Daily Exercise Cuts Heart Risk in Diabetics

Patients with type 2 diabetesshould do at least two-and-a-half hours per week of moderate-intensity or one-and-a-half hours per weekof vigorous-intensity aerobic exercises, plus some weight training, to reduce their cardiovascular risk, researchers suggest.
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“Given the observed increases in type 2 diabetes in adults over the last few decades in developed countries, and the increasing numbers of overweight and obese individuals throughout the world, we must look at ways to reduce the cardiovascular complications of diabetes, and exercise is one of those ways,” said Thomas H. Marwick, M.D., Ph.D., professor of medicine and director of the Centre of Clinical Research Excellence in Cardiovascular and Metabolic Disease at the University of Queensland School of Medicine in Brisbane, Australia.

According to an American Heart Association scientific statement, diet and exercise can prevent or slow the development of type 2 diabetes and produce clinically significant improvements in blood sugar control and cardiovascular risk factors in people with the condition.

To improve cardiovascular risk, type 2 diabetes patients should get at least 150 minutes per week of moderate-intensity exercise or 90 min/week of vigorous-intensity exercise, or some combination of the two.

Patients should exercise on at least three non-consecutive days each week to maximize benefits. Individual sessions should be at least 10 minutes each or longer.

Resistance training should be encouraged, and should be moderate to high-intensity 2-4 sets of 8-10 repetitions at a weight that can’t be lifted more than 8-10 times, with 1-2-minute rest periods between sets.

Exercise counseling is needed to assess and adjust levels of physical activity and provide motivation and support. Telephone counselling is economical, practical and effective.

Source:The statement was published in Circulation: Journal of the American Heart Association.

 
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Vitamins Might Undo Your Exercise Efforts

New research suggests taking vitamins after exercise may undo some of the beneficial effects of your workout.

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Some advocate taking antioxidants like vitamin C and E to help protect your body from harmful chemical by-products it creates in breaking into a sweat. But some scientists now believe these “free radicals” may actually be good for you and even buffer against diabetes — which means that mopping them up with antioxidants may do more harm than good.

It is thought that antioxidant vitamins prevent oxidative stress damage to your body’s tissues by eliminating the free radicals that cause it. Oxidative stress has been implicated in several major diseases, including cancer and heart disease.

But a research team has claimed that free radicals may have a positive effect on your body by increasing its sensitivity to insulin, something that is lost in type 2 diabetes; this effect is blocked by antioxidant vitamins.

Reacting to the study, antioxidant expert Dr. Alexander Schauss said that the title of the study (Antioxidants prevent health-promoting effects of physical exercise in humans) was misleading. He said:

“The primary objective of this study was to study the effect of a 4-week intensive 5-days a week exercise program on insulin sensitivity. Yet the title of the paper leads one to believe otherwise.

This is a small gender-biased study of 40 male subjects, 25 to 35 years of age. When I read through the study for the first time I had to wonder, how could the authors have come up with such a title for their paper?”

In addition to questioning the study design, particularly with respect to both trained and untrained people being assigned to an intensive exercise program, Dr. Schauss also questioned the conclusions drawn from the data. Dr. Schauss said:

“Skeletal muscle biopsies were obtained from the right vastus lateralis muscle of study subjects. But some of the data is missing for a number of subjects, and reported as such by the authors.”

Dr. Schauss also noted that the authors presented no evidence of adverse effects by any of the individuals from vitamin C and E supplementation.

Sources:

BBC News May 11, 2009

Proceedings of the National Academy of Sciences of the United States May 11, 2009

NutraIngredients.com May 12, 2009

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