Shipping is free the first week. Thom Tillis on "Face the Nation". Warning Signs of Type 2 Diabetes. Luke's Roosevelt Hospital in New York found that postmenopausal women who followed a 1,calorie plan for 16 weeks lost an average of 21 pounds. As a result, two foods could have the same glycemic index, but produce different amounts of insulin. The two plans give people an option to find what works best for their own success. A Guide to Health and Nutrition.
Online/Web-based Diet Programs
Nutrisystem is the least expensive meal delivery plan we reviewed Medifast is cheaper, but you have to provide one meal a day on your own. And the silver-spoon award undoubtedly goes to In The Zone Delivery , a white-glove service for people who'll spare no expense to drop the pounds. Here's how the plans stack up. See the handy chart at the bottom of the page for a side-by-side comparison. The oldest national weight-loss program, its members rave about the encouragement they get at weekly meetings led by former Weight Watchers dieters.
Nutritionists praise the portion-control points system: Each food is assigned points based on its serving size, calories, fiber, and fat; and no foods are forbidden. Your point allowance is based on your weight, height, gender, age, and activity level. A recent clinical study in the New England Journal of Medicine linked group counseling sessions to weight-loss success.
That explains why Weight Watchers has impressive short-term results. A study in the Annals of Internal Medicine showed participants lost an average of about 5 percent of their body weight 10 pounds in six months. Two years later, they had kept about half the weight off. After that, you get free lifetime membership.
The company says members using its online tools in addition to attending meetings lost 50 percent more weight than those going to meetings alone. Cost to lose 20 pounds: We looked at two plans from eDiets — one that offers support alone, and another with meal delivery. You can choose from among more than 20 diet plans, including ones for diabetics and vegetarians. Online tools let you set goals, plan menus and generate shopping lists. The optional meal delivery service offers freshly prepared, calorie-controlled meals delivered in a cooler.
But telephone support has some evidence in its favor: Cost per pound of weight loss: No — for about the same money, other services offer better track records.
For the first two weeks, you eat three extremely low-carb meals a day plus two snacks. You can customize menus, search a database of more than 1, recipes and get a personalized shopping list. Studies have shown that after one year, carb-restricted diets led to greater weight loss and increased heart health than low-fat diets. However, the advantage disappeared over the long term. How much can you expect to lose? Figure on 8 to 13 pounds during the two-week kick-start phase, then 1 to 2 pounds a week thereafter.
The Zone diet is mostly meat, fruits, and vegetables. You eat three meals per day plus two Zone protein-powder snacks. A study of people in the Journal of American Medical Association found the Zone diet helped people achieve modest weight loss after one year, comparable with those on the Atkins , Weight Watchers and Ornish diets, and improved cardiac risk factors. Pricing information is noticeably, frustratingly absent from the Jenny Craig Web site.
You eat three Jenny Craig meals plus a snack per day, and supplement with fruit, vegetables and dairy. Once a week, you get a weigh-in and pep talk with a consultant — who is not a dietician and who earns commissions from selling you products.
Jenny Craig has a good track record for short-term weight loss up to one year. In a UC San Diego clinical trial of dieters funded by Jenny Craig , Jenny Craig clients lost 11 percent of their initial weight after 12 months, compared with 3 percent weight loss by those who were dieting on their own.
Shipping is free the first week. As a result, two foods could have the same glycemic index, but produce different amounts of insulin. Likewise, two foods could have the same glycemic load, but cause different insulin responses. Furthermore, both the glycemic index and glycemic load measurements are defined by the carbohydrate content of food.
For some food comparisons, the " insulin index " may be more useful. More importantly, the glycemic response is different from one person to another, and also in the same person from day to day, depending on blood glucose levels, insulin resistance , and other factors. The glycemic index only indicates the impact on glucose level two hours after eating the food. People with diabetes have elevated levels for four hours or longer after eating certain foods.
Foods with carbohydrates that break down quickly during digestion and release glucose rapidly into the bloodstream tend to have a high GI; foods with carbohydrates that break down more slowly, releasing glucose more gradually into the bloodstream, tend to have a low GI.
The concept was developed by Dr. Jenkins and colleagues  in — at the University of Toronto in their research to find out which foods were best for people with diabetes. A lower glycemic index suggests slower rates of digestion and absorption of the foods' carbohydrates and can also indicate greater extraction from the liver and periphery of the products of carbohydrate digestion. A lower glycemic response usually equates to a lower insulin demand but not always, and can improve long-term blood glucose control  and blood lipids.
The insulin index is also useful for providing a direct measure of the insulin response to a food. The glycemic index of a food is defined as the incremental area under the two-hour blood glucose response curve AUC following a hour fast and ingestion of a food with a certain quantity of available carbohydrate usually 50 g. The AUC of the test food is divided by the AUC of the standard either glucose or white bread, giving two different definitions and multiplied by The average GI value is calculated from data collected in 10 human subjects.
Both the standard and test food must contain an equal amount of available carbohydrate. The result gives a relative ranking for each tested food. The current validated methods use glucose as the reference food, giving it a glycemic index value of by definition. This has the advantages of being universal and producing maximum GI values of approximately For people whose staple carbohydrate source is white bread, this has the advantage of conveying directly whether replacement of the dietary staple with a different food would result in faster or slower blood glucose response.
A disadvantage with this system is that the reference food is not well-defined, because there is no universal standard for the carbohydrate content of white bread.
GI values can be interpreted intuitively as percentages on an absolute scale and are commonly interpreted as follows:.
A low-GI food will cause blood glucose levels to increase more slowly and steadily, which leads to more suitable postprandial after meal blood glucose readings. A high-GI food causes a more rapid rise in blood glucose level and is suitable for energy recovery after exercise or for a person experiencing hypoglycemia.
The glycemic effect of foods depends on a number of factors, such as the type of starch amylose versus amylopectin , physical entrapment of the starch molecules within the food, fat and protein content of the food and organic acids or their salts in the meal — adding vinegar , for example, will lower the GI.
In general, coarse, grainy breads with higher amounts of fiber have a lower GI value than white breads. While adding fat or protein will lower the glycemic response to a meal, the relative differences remain. That is, with or without additions, there is still a higher blood glucose curve after a high-GI bread than after a low-GI bread such as pumpernickel.
Fruits and vegetables tend to have a low glycemic index. The glycemic index can be applied only to foods where the test relies on subjects consuming an amount of food containing 50 g of available carbohydrate. Carrots were originally and incorrectly reported as having a high GI. This has been refuted by brewing industry professionals, who say that all maltose sugar is consumed in the brewing process and that packaged beer has little to no maltose present.
Dietary replacement of saturated fats by carbohydrates with a low glycemic index may be beneficial for weight control , whereas substitution with refined, high glycemic index carbohydrates is not. Several lines of recent  scientific evidence have shown that individuals who followed a low-GI diet over many years were at a significantly lower risk for developing both type 2 diabetes , coronary heart disease , and age-related macular degeneration than others.
Postprandial hyperglycemia is a risk factor associated with diabetes. A study shows that it also presents an increased risk for atherosclerosis in the non-diabetic population  and that high GI diets, high blood-sugar levels more generally,  and diabetes  are related to kidney disease as well.
Conversely, there are areas such as Peru and Asia where people eat high-glycemic index foods such as potatoes and high-GI rice without a high level of obesity or diabetes. A study from the University of Sydney in Australia suggests that having a breakfast of white bread and sugar-rich cereals, over time, can make a person susceptible to diabetes, heart disease, and even cancer.
The American Diabetes Association supports glycemic index but warns that the total amount of carbohydrate in the food is still the strongest and most important indicator, and that everyone should make their own custom method that works best for them.
The International Life Sciences Institute concluded in that because there are many different ways of lowering glycemic response, not all of which have the same effects on health, "It is becoming evident that modifying the glycemic response of the diet should not be seen as a stand-alone strategy but rather as an element of an overall balanced diet and lifestyle.
A systematic review of few human trials examined the potential of low GI diet to improve pregnancy outcomes. Potential benefits were still seen despite no ground breaking findings in maternal glycemia or pregnancy outcomes.
In this regard, more women under low GI diet achieved the target treatment goal for the postprandial glycemic level and reduced their need for insulin treatment. A low GI diet can also provide greater benefits to overweight and obese women. Intervention at an early stage of pregnancy has shown a tendency to lower birth weight and birth centile in infants born to women with GDM. Depending on quantities, the number of grams of carbohydrate in a food can have a bigger impact on blood sugar levels than the glycemic index does.
Consuming less dietary energy, losing weight, and carbohydrate counting can be better for lowering the blood sugar level.