The Dream Diet; losing weight while you sleep

Can more sleep really help us control our weight? Three top experts explore the possibilities. By Colette Bouchez WebMD Weight Loss Clinic-Feature Reviewed by Leonard J. Sonne, MD Lose weight while you sleep. It sounds like something you'd hear on a late night infomercial -- just around the time you are reaching for that bag of cookies because, well, you can't sleep. But as wild as the idea sounds, substantial medical evidence suggests some fascinating links between sleep and weight. Researchers say that how much you sleep and quite possibility the quality of your sleep may silently orchestrate a symphony of hormonal activity tied to your appetite. "One of the more interesting ideas that has been smoldering and is now gaining momentum is the appreciation of the fact that sleep and sleep disruption do remarkable things to the body -- including possibly influencing our weight," says David Rapoport, MD, associate professor and director of the Sleep Medicine Program at the New York University School of Medicine in New York City. While doctors have long known that many hormones are affected by sleep, Rapoport says it wasn't until recently that appetite entered the picture. What brought it into focus, he says, was research on the hormones leptin and ghrelin. First, doctors say that both can influence our appetite. And studies show that production of both may be influenced by how much or how little we sleep. In fact, have you ever experienced a sleepless night followed by a day when no matter what you ate you never felt full or satisfied? If so, then you have experienced the workings of leptin and ghrelin. How Hormones Affect Your Sleep Leptin and ghrelin work in a kind of "checks and balances" system to control feelings of hunger and fullness, explains Michael Breus, PhD, a faculty member of the Atlanta School of Sleep Medicine and director of The Sleep Disorders Centers of Southeastern Lung Care in Atlanta. Ghrelin, which is produced in the gastrointestinal tract, stimulates appetite, while leptin, produced in fat cells, sends a signal to the brain when you are full. So what's the connection to sleep? "When you don't get enough sleep, it drives leptin levels down, which means you don't feel as satisfied after you eat. Lack of sleep also causes ghrelin levels to rise, which means your appetite is stimulated, so you want more food," Breus tells WebMD. The two combined, he says, can set the stage for overeating, which in turn may lead to weight gain. Studies: Those Who Sleep Less Often Weigh More How the hormones leptin and ghrelin set the stage for overeating was recently explored in two studies conducted at the University of Chicago in Illinois and at Stanford University in California. In the Chicago study, doctors measured levels of leptin and ghrelin in 12 healthy men. They also noted their hunger and appetite levels. Soon after, the men were subjected to two days of sleep deprivation followed by two days of extended sleep. During this time doctors continued to monitor hormone levels, appetite, and activity. The end result: When sleep was restricted, leptin levels went down and ghrelin levels went up. Not surprisingly, the men's appetite also increased proportionally. Their desire for high carbohydrate, calorie-dense foods increased by a whopping 45%. It was in the Stanford study, however, that the more provocative meaning of the leptin-ghrelin effect came to light. In this research -- a joint project between Stanford and the University of Wisconsin -- about 1,000 volunteers reported the number of hours they slept each night. Doctors then measured their levels of ghrelin and leptin, as well as charted their weight. The result: Those who slept less than eight hours a night not only had lower levels of leptin and higher levels of ghrelin, but they also had a higher level of body fat. What's more, that level of body fat seemed to correlate with their sleep patterns. Specifically, those who slept the fewest hours per night weighed the most.The Dream Diet: Losing Weight While You Sleep Can more sleep really help us control our weight? Three top experts explore the possibilities. (continued) Eating and Sleep Apnea: The New Connection As a result of these and other studies, researchers began to theorize that getting more sleep just might be the answer to society's burgeoning waistline. But before you trade the cost of your gym membership for a pricey new mattress, take note: Experts also say the relationship is not as obvious as it seems. The reason: Enter the somewhat mysterious nocturnal ailment known as "obstructive sleep apnea." People with sleep apnea may stop breathing for up to a minute, sometimes hundreds of times during the night while sleeping, says Dominic Roca, MD, director of the Connecticut Center for Sleep Medicine at Stamford Hospital. Though the exact cause of the problem remains unknown, Roca and others believe that in most instances physical abnormalities inside the mouth and neck cause the soft tissue in the rear of the throat to collapse. This briefly closes off air passages many times during a night, causing disruption in breathing and a tendency to snore. The end result: Although you may go to bed early and think you are getting a good night's rest, the disruption in breathing prevents you from getting deep sleep. Eight hours of disrupted shut eye can leave you feeling like you had only four. "You wake up feeling tired and continue to feel tired all day," Roca tells WebMD. The Link Between Sleep Apnea and Weight So what does sleep apnea have to do with weight gain? First, says Roca, patients who suffer from sleep apnea are more likely to be obese. However, studies show they do not have the usual low leptin levels associated with being overweight. In fact, Roca says that folks with sleep apnea have uncharacteristically high levels of leptin. What's more, when their apnea is treated, leptin levels drop -- and somehow that helps them to lose weight. "I've had about thirty patients who, when successfully treated for their sleep apnea were able to lose weight -- possibly because they had more energy, so they were more active and they just ate less," says Breus. So why does low leptin seem to cause weight gain in some folks while allowing others to lose weight? One theory says that it may not be the level of this hormone that matters so much as a person's individual response to it. In much the same way that obese people can become resistant to insulin, folks with apnea may be resistant to the fullness signal that leptin sends to the brain. "It's like the body is trying to tell them to stop eating, but their brain just isn't getting the message," says Breus. Another theory: The overall response to leptin may be more individual than we think. Experts say our environment, dietary habits, exercise patterns, personal stress levels, and particularly our genetics may all influence the production of leptin and ghrelin, as well as our response to them. The fact that we just don't know causes at least some experts to view all the research on sleep and weight with a cautious or skeptical eye. "There is a serious challenge to the closing of the loop. That isn't to say that what we know about leptin and ghrelin is not important, or that when we finally do understand it that it won't be crystal clear -- but right now it just isn't," Rapoport tells WebMD. Breus agrees: "I think we are likely to find that bad sleep matters but that it's likely to be bad sleep plus some other problems. I don't think we know what they are yet." Sleep: You Can't Lose Until doctors do know more, most experts agree that if you are dieting, logging in a few extra hours of sleep a week is not a bad idea, particularly if you get six hours of sleep or less a night. You may just discover that you aren't as hungry, or that you have lessened your craving for sugary, calorie-dense foods. "One thing I have seen is that once a person is not as tired, they don't need to rely on sweet foods and high carbohydrate snacks to keep them awake -- and that automatically translates into eating fewer calories," says Breus. If, on the other hand, you already sleep a lot, or you increase your sleep and feel even more tired, you should talk to your doctor. Experts say you may be one of the thousands of people with undiagnosed sleep apnea. Says Roca: "As research continues, more and more data comes to the forefront to suggest that you simply can't cut back on sleep without paying some price."

Eggs: Are they good or bad for my cholesterol?

Eggs are high in cholesterol, which contributes to high blood cholesterol levels. From MayoClinic.com Find More Dietary fats: Know which types to choose Trans fat: Avoid this cholesterol double whammy Butter vs. margarine: Which is better for my heart? Q: I'm confused. Are eggs good or bad for my cholesterol? A: Eggs are high in cholesterol, and a diet high in cholesterol can contribute to elevated blood cholesterol levels. But the extent to which dietary cholesterol raises blood cholesterol levels isn't clear. Many scientists believe that saturated fats and trans fats have a greater impact than dietary cholesterol in raising blood cholesterol. If you are healthy, it is recommended that you limit your dietary cholesterol intake to less than 300 milligrams (mg) a day. If you have cardiovascular disease, diabetes or high LDL cholesterol, limit dietary cholesterol intake to less than 200 mg a day. The yolk of one large egg has about 213 mg of cholesterol. If you eat an egg on a given day, it may be a good idea to limit or avoid other sources of cholesterol for the rest of that day. If you like eggs but don't want the extra cholesterol, use egg whites. Egg whites contain no cholesterol. You may also use cholesterol-free egg substitutes, which are made with egg whites. If you want to reduce cholesterol in a recipe that calls for eggs, you can use two egg whites or 1/4 cup cholesterol-free egg substitute in place of one whole egg. Find Out if These Foods Lower Your Cholesterol Pomegranate Juice Soy Coffee Garlic Nuts Cinnamon content by: Last Updated: December 30, 2005 ©1998-2007 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved. A single copy of these materials may be reprinted for noncommercial personal use only. "Mayo," "Mayo Clinic," "MayoClinic.com," "Mayo Clinic Health Information," "Reliable information for a healthier life" and the triple-shield Mayo logo are trademarks of Mayo Foundation for Medical Education and Research. Terms of use. More About Cholesterol Overview What Increases Your Risk? Prevention Treatment Options Trans Fat Dirty Dozen Should You Ditch Dairy? The Skinny on Cooking With Fat Does Coffee Raise Cholesterol?Find more... Food content guides Cholesterol monitoring aids Nutritional supplements More on MSN Top 10 Ecotourist Hotspots Are You Raising Another Man's Child? Power Foods for Midlife Bodies

Wednesday, June 13, 2007

foods to help fight cancer

Eating Right for Energy
Nutrition Tips for Energy
Strong Foods
7 Foods for Strength
Fighting Cancer: Nutrition Know-How

Food as Medicine Is the recipe for better health found in the pantry?
Read Full Article
Vitamin D: The Unsung Hero of Bone Health
5 Foods to Pump Up Your Health
Cancer Fatigue: Boosting Your Energy

5 Ways to Fight Cancer Fatigue You need more than vitamins. Doctors recommend these key ways to fight cancer fatigue.
Read Full Article

Poison Ivy, Oak, or Sumac - Topic Overview

What are poison ivy, oak, and sumac?
Poison ivy, poison oak, and poison sumac are plants that can cause a skin rash called allergic contact dermatitis upon contact. The red, uncomfortable, and itchy rash often shows up in lines or streaks and is marked by fluid-filled bumps (blisters) or large raised areas (hives). It is the most common skin problem caused by contact with plants (plant dermatitis).
See an illustration of poison ivy, oak, and sumac leaves.
What causes a poison ivy, oak, or sumac rash?
The rash is caused by contact with an oil (urushiol) found in poison ivy, oak, or sumac. Urushiol is an allergen, so the rash is actually an allergic reaction to the oil in these plants. Indirect contact with urushiol can also cause the rash. This may happen when you touch clothing, pet fur, sporting gear, gardening tools, or other objects that have come in contact with one of these plants.
What are the symptoms of the rash?
The usual symptoms of the rash are:
Itchy skin where you came in contact with the plant.
Red streaks or lines where the plant brushed against the skin, or general redness.
Small bumps or larger raised areas (hives).
Blisters filled with fluid that sometimes leaks out.
The rash usually appears 8 to 48 hours after your contact with the urushiol. The rash will continue to develop in new areas over several days but only on the parts of your skin that had contact with the urushiol or those parts where the urushiol was spread by touching.
The rash is not contagious. You cannot catch or spread a rash once it appears, even if you touch it or the blister fluid, because the urushiol will already be absorbed or washed off the skin. The rash may seem to be spreading, but either it is still developing from earlier contact or you have touched something that still has urushiol on it.
The more urushiol you come in contact with, the more severe your skin reaction. Severe reactions to smaller amounts of urushiol also may develop in people who are highly sensitive to urushiol. Serious symptoms may include:
Swelling (edema) of the face, mouth, neck, genitals, or eyelids, sometimes to the point of being unable to open eyes.
Widespread, large blisters that ooze large amounts of fluid.
How is the rash diagnosed?
The rash usually is diagnosed during a physical examination. Your health professional will examine the rash and ask questions to find out when you were exposed to the plant and how long it took the rash to develop. If you are not sure whether you were exposed to a plant, he or she will ask about your outdoor activities, work, and hobbies.
How is the rash treated?
Most poison ivy, oak, or sumac rashes can be treated successfully at home. Initial treatment consists of washing the area with water immediately after contact with the plants. To relieve symptoms, use wet compresses and take cool baths. Nonprescription antihistamines and calamine lotion also may help relieve symptoms. Moderate or severe cases of the rash may require treatment by a health professional, who may prescribe corticosteroid pills, creams, or ointments.
How can I prevent the rash from poison ivy, oak, and sumac?
The best way to prevent the rash is to learn to identify and avoid the plants. When contact with the plants is unavoidable, heavy clothing (long pants, long-sleeved shirt, and vinyl gloves) and barrier creams or lotions may provide some protection.
Frequently Asked Questions
Learning about poison ivy, oak, and sumac:
What are poison ivy, oak, and sumac?
What causes a poison ivy, oak, or sumac rash?
Can I prevent the poison ivy, oak, or sumac rash?
What are the symptoms of a poison ivy, oak, or sumac rash?
What happens in a poison ivy, oak, or sumac rash?
What increases my risk for getting a poison ivy, oak, or sumac rash?
Where are poison ivy, oak, and sumac found, and what do they look like?
Can other plants cause a rash?
What other types of rash may look like poison ivy, oak, or sumac rash?
Who is affected by poison ivy, oak, and sumac rashes?
Being diagnosed:
Who can diagnose a poison ivy, oak, or sumac rash?
How is a poison ivy, oak, or sumac rash diagnosed?
Getting treatment:
How is a poison ivy, oak, or sumac rash treated?
What medications will I need to take?
Living with poison ivy, oak, and sumac rash:
What can I do at home to relieve symptoms of a poison ivy, oak, or sumac rash?
How often will I need to see my health professional?
When should I call my health professional?