 |
|
How does soy promote weight loss? University of Illinois scientist finds another clue
May 02, 2007Research shows that when soy consumption goes up, weight goes down. A new University of Illinois study may help scientists understand exactly how that weight loss happens.
"We wanted to compare the effects of soy protein hydrolysates and soy peptides with those of leptin because we hypothesized that soy might behave in the body in a similar way. Leptin is a hormone produced in our adipose tissue that interacts with receptors in the brain and signals us that we're full so we stop eating," said Elvira de Mejia, a U of I assistant professor of food science and human nutrition.
The researchers wanted to see if soy protein hydrolysates could affect these regulatory hormones and their receptors.
"And we found that soy did have an effect on these mechanisms and hormones that are induced in the body to help us degrade lipids and reduce body weight, but it did so by boosting metabolism and not by reducing food intake," she said.
To compare soy peptides with leptin, de Mejia's graduate student Nerissa Vaughn, with the help of associate professor Lee Beverly, implanted cannulas in the brains of lab rats; they then injected leptin as a positive control. When the scientists could see their model was working, they injected two formulations of hydrolyzed soy protein and soy peptides so the scientists could monitor the effects of each on food intake and weight loss.
Injections were given three times a week for two weeks; during that time, the animals had unlimited access to food and water. Food intake was measured 3, 6, 12, 24, and 48 hours after injection, and the rats were weighed 24 and 48 hours after injection. All rats received the same amount of exercise, and all rats lost weight.
But, after the third injection, de Mejia and Vaughn noticed a significant weight loss in the group of animals that had received one of the soy hydrolysates, even though the animals hadn't changed their eating habits. In this instance, soy protein appeared to have caused weight loss not by reducing food intake but by altering the rats' metabolism.
The experiment not only showed that soy peptides could interact with receptors in the brain, it also demonstrated that eating less isn't always the reason for weight loss, the researcher said.
"Weight loss is a complex physiological event. It's not always as simple as 'Eat less or exercise more,' said de Mejia.
"Losing weight is a cascade of many steps, beginning with the production of certain hormones and continuing with their action in the brain. Some people are resistant to these hormones, just as other people are insulin-resistant. These people never receive the message from the brain that tells them they're full," she added.
de Mejia plans to continue investigating the effects of soy proteins on weight loss. She believes soy contains anorectic peptides that signal a feeling of satiety as well as peptides that boost the metabolism. Her next step will be to fractionate and purify the soy hydrolysates so that she can identify each peptide and understand its bioactivity.
University of Illinois at Urbana-Champaign
"And we found that soy did have an effect on these mechanisms and hormones that are induced in the body to help us degrade lipids and reduce body weight, but it did so by boosting metabolism and not by reducing food intake," she said.
To compare soy peptides with leptin, de Mejia's graduate student Nerissa Vaughn, with the help of associate professor Lee Beverly, implanted cannulas in the brains of lab rats; they then injected leptin as a positive control. When the scientists could see their model was working, they injected two formulations of hydrolyzed soy protein and soy peptides so the scientists could monitor the effects of each on food intake and weight loss.
Injections were given three times a week for two weeks; during that time, the animals had unlimited access to food and water. Food intake was measured 3, 6, 12, 24, and 48 hours after injection, and the rats were weighed 24 and 48 hours after injection. All rats received the same amount of exercise, and all rats lost weight.
But, after the third injection, de Mejia and Vaughn noticed a significant weight loss in the group of animals that had received one of the soy hydrolysates, even though the animals hadn't changed their eating habits. In this instance, soy protein appeared to have caused weight loss not by reducing food intake but by altering the rats' metabolism.
The experiment not only showed that soy peptides could interact with receptors in the brain, it also demonstrated that eating less isn't always the reason for weight loss, the researcher said.
"Weight loss is a complex physiological event. It's not always as simple as 'Eat less or exercise more,' said de Mejia.
"Losing weight is a cascade of many steps, beginning with the production of certain hormones and continuing with their action in the brain. Some people are resistant to these hormones, just as other people are insulin-resistant. These people never receive the message from the brain that tells them they're full," she added.
de Mejia plans to continue investigating the effects of soy proteins on weight loss. She believes soy contains anorectic peptides that signal a feeling of satiety as well as peptides that boost the metabolism. Her next step will be to fractionate and purify the soy hydrolysates so that she can identify each peptide and understand its bioactivity.
University of Illinois at Urbana-Champaign
Soy Current Events and Soy News RSSLactose intolerance rates may be significantly lower than previously believed
Prevalence of lactose intolerance may be far lower than previously estimated, according to a study in the latest issue of Nutrition Today.
Moderate amounts of protein per meal found best for building muscle
For thousands of years, people have believed that eating large amounts of protein made it easier to build bigger, stronger muscles. Take Milo of Croton, the winner of five consecutive Olympic wrestling championships in the sixth century BC: If ancient writers are to be believed, he built his crushing strength in part by consuming 20 pounds of meat every day.
Phytochemicals in plant-based foods could help battle obesity, disease
The cheeseburger and French fries might look tempting, but eating a serving of broccoli or leafy greens first could help people battle metabolic processes that lead to obesity and heart disease, a new University of Florida study shows.
Novel, soy-based SE5-OH containing Natural S-equol supplement reduced hot flash frequency by nearly 59 percent
SE5-OH containing Natural S-equol, a novel soy germ-based ingredient in a supplement, improved menopausal symptoms, including significantly reducing hot flash frequency by nearly 59 percent, according to a peer-reviewed study in Japanese women.
Preventing allergies
Allergic diseases are becoming increasingly common in Western industrialized countries. As there is still no etiologically based treatment of allergic asthma, hay fever, or atopic eczema, the prevention of these diseases is a matter of special importance.
Biofuel production could undercut efforts to shrink Gulf 'Dead Zone'
Scientists in Pennsylvania report that boosting production of crops used to make biofuels could make a difficult task to shrink a vast, oxygen-depleted "dead zone" in the Gulf of Mexico more difficult.
Buyer beware: Estrogen supplements not as effective as claimed
Dietary supplements claiming to help postmenopausal women with bone health may not be doing what they say, according to new research from Purdue University.
U of Minnesota researchers discover high levels of estrogens in some industrial wastewater
In a groundbreaking study, civil engineering researchers in the University of Minnesota's Institute of Technology have discovered that certain industries may be a significant source of plant-based estrogens, called phytoestrogens, in surface water.
ADA releases updated position paper on vegetarian diets
The American Dietetic Association has released an updated position paper on vegetarian diets that concludes such diets, if well-planned, are healthful and nutritious for adults, infants, children and adolescents and can help prevent and treat chronic diseases including heart disease, cancer, obesity and diabetes.
Vitamin E, selenium and soy in combination does not prevent prostate cancer
The combination therapy of vitamin E, selenium and soy does not prevent the progression from high-grade prostatic intraepithelial neoplasia (HGPIN) to prostate cancer, according to the new research presented at the 104th Annual Scientific Meeting of the American Urological Association (AUA).
More Soy Current Events and Soy News Articles
 |
Nature's Bounty Soy Isoflavones, Non-GMO, 120 Capsules by Nature's Bounty Dietary Supplement. Promotes Menopausal Health. With daidzein, genistein and other soy isoflavones. Soy is the perfect supplement for women undergoing menopausal changes. Soy is a rich, plant-based source of phytonutrients, naturally occurring compounds that help relieve hot flashes in menopausal women. Made from non-GMO certified soybeans, Soy Isoflavones provide holistic supplementation for a woman's most active years. (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease). |
|
All-Natural Kimono Onepiece by Baby Soy in Ocean (6-12 months) by Babysoy Noted for its soft fabrics and a chic, stylish design, you can match this one-piece with any of the Baby Soy Signature line for the perfect coordinated outfit. Did you know that soybean fiber is considered to be vegetable cashmere; its soft, smooth and ultra-light? | |
 |
The Whole Soy Story: The Dark Side of America's Favorite Health Food by Kaayla T. Daniel (Author) A groundbreaking expose that tells the truth about soy that scientists know but that the soy industry has tried to suppress. Soy is not a health food, does not prevent disease and has not even been proven safe.--Epidemiological, clinical and laboratory studies link soy to malnutrition, digestive problems, thyroid dysfunction, cognitive decline, reproductive disorders, even heart disease and cancer. |
 |
Silk Aseptic Soymilk, Very Vanilla, 8.25-Ounce Cartons (Pack of 18) by Silk Brace your buds for big, bold vanilla. It's the perfect way to satisfy a sweet tooth-and a craving for wholesome nutrition-in one simple sip. Rich in vitamins and minerals, such as calcium and vitamins A, C, D, B6 and B12 shelf stable; requires no refrigeration until after opening. |
 |
Soy by Ednita Nazario Once more, one of the most beloved and admired singers of the Spanish-speaking world, Ednita Nazario, is about to enthrall her fans.
Puerto Rican singing star Ednita is set to release a new album!
A trendsetter and a rocker, Ednita never ceases to surprise with her musical selections. And this time, she is joined by some of the most prestigious composers in the industry, including Rafael Esparza, Claudia Brant, Samo (from pop rock group Camila), Mark Portman and Tommy Torres.
Tommy Torres, a fellow Puerto Rican and close friend of Ednita's, is also one of the outstanding producers in charge of this new album, scheduled for release on October 27. Sebastián Krys and Graeme Pleeth are two of the other producers who have joined forces with Ednita to make this... |
 |
Glenny's Low Fat Soy Crisps, Cheddar, 1.3-Ounce Bags (Pack of 24) by Glenny's 9 g Soy Protein. 30% Daily value Calcium (Based on recent medical research, the combination of Calcium, Vitamin D, Vitamin K and Soy Protein is a nutritional powerhouse to keep bones healthy and strong. Besides great cheddar flavor, Glenny's Soy Crisps are a good source of Calcium, Folic Acid, Vitamin D and Vitamin K.). 40% RDI Folic Acid. Great taste! Real cheddar cheese. Tastes fabulous! Healthy Benefits: One 1.3 oz. bag provides you with - 9 g Soy Protein; 23 mg Soy Isoflavones; 40% RDI Folic Acid; 30% RDI Calcium. Baked not fried. Made from Non GMO Soy. Natural since 1979. |
 |
Baby Soy Layered Romper, 12-18M, Ocean by Baby Soy This modern & sporty one-piece ensemble by Baby Soy makes dressing fun and fast. Snaps run from collar to ankle and at the crotch to allow quick diaper changes. Baby Soy features modern baby layettes made from eco-friendly soybean fiber. Baby Soy is conscientious and green by using renewable natural resources as the raw material for its baby wear --- which is the leftover pulp from tofu, soymilk and other soy products. |
 |
The Hidden Dangers of Soy by Dianne Gregg (Author) Could Soy be Killing Your Family? Do you believe that soy offers protection or a cure against cancer, heart disease, osteoporosis, menopause, and other illnesses? Want to know whether soy formula is good for your infant and what the possible affects soy foods can have on your entire family? Are you one of the millions of people suffering from unusual weight gain and never thought that soy might be the cause? If so, you are not alone. I reveal the dangers of soy and what you need to know. I want to share my story with you and possibly save you and your family's life. Learn: * What ingredients to look for on the labels * What alternative ingredients to use including soy-free recipes. * Why the soybean industry wants you to believe it's the... |
 |
Glenny's Low Fat Soy Crisps, Lightly Salted, 1.3-Ounce Bags (Pack of 24) by Glenny's Low fat. Great taste! 10 g Pure soy protein! Only 70 calories per serving. Naturally delicious. Non GMO soy. One 1.3 oz. bag provides you with: 10 g Soy Protein, 25 mg Soy Isoflavones, 3 g Dietary Fiber, more Soy Protein than tofu or soy milk. Baked not fried. |
 |
Total Soy-Naturade Soy Meal Replacement, 2lb 12 oz. Vanilla by Naturade Naturade Total Soy can help you lose weight. Being overweight may be a special concern if you're trying to reduce cholesterol. Each delicious shake provides balanced nutrition and is low in fat and cholesterol with only 150 calories per serving so you can replace one or two meals and cut 500 - 1000 calories a day without feeling hungry. |
| © 2009 BrightSurf.com |