Diet Myth or Truth: Fasting Is Effective for Weight Loss

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Is there any downside to chia? Is Nutrisystem worth it? What works for me is not going to work for you. In , the Canadian government ruled that foods sold in Canada could not be marketed with reduced or eliminated carbohydrate content as a selling point, because reduced carbohydrate content was not determined to be a health benefit. My wife signed up at the same time, and she has not lost very much at all. I plan to continue as a member of Nutrisystem and enjoy all the benefits they have to offer.

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The Truth About Chia

People who stay on these diets very long may not get enough vitamins and minerals and face other potential health risks. Eckel , past president, noted that a low-carbohydrate diet could potentially meet AHA guidelines if it conformed to the AHA guidelines for low fat content. The position statement by the Heart Foundation regarding low-carbohydrate diets states: Low-carbohydrate diets became a major weight loss and health maintenance trend during the late s and early s.

Because of the substantial controversy regarding low-carbohydrate diets, and even disagreements in interpreting the results of specific studies, it is difficult to objectively summarize the research in a way that reflects scientific consensus. Although there has been some research done throughout the twentieth century, most directly relevant scientific studies have occurred in the s and early s and, as such, are relatively new and the results are still debated in the medical community.

A systematic review studying the effects of a low-carbohydrate diet LCD on weight loss and cardiovascular risk factors showed that the diet that was studied was associated with significant decreases in body weight, body mass index , abdominal circumference, blood pressure , triglycerides , fasting blood sugar , blood insulin and plasma C-reactive protein , as well as an increase in high-density lipoprotein cholesterol HDL. Low-density lipoprotein cholesterol LDL and creatinine did not change significantly.

The study found the LCD was shown to have favorable effects on body weight and major cardiovascular risk factors but concluded the effects on long-term health are unknown. The study did not compare health benefits of LCD to low-fat diets.

A meta-analysis published in the American Journal of Clinical Nutrition in compared low-carbohydrate, Mediterranean, vegan, vegetarian, low-glycemic index, high-fiber, and high-protein diets with control diets. The researchers concluded that low-carbohydrate, Mediterranean, low-glycemic index, and high-protein diets are effective in improving markers of risk for cardiovascular disease and diabetes.

Advocates of low-carbohydrate diets generally dispute any suggestion that such diets cause weakness or exhaustion except in the first few weeks as the body adjusts , and indeed most highly recommend exercise as part of a healthy lifestyle. Some critics imply or explicitly argue that vegetables and fruits are inherently all heavily concentrated sources of carbohydrates so much so that some sources treat the words 'vegetable' and 'carbohydrate' as synonymous.

Thus, in absolute terms, even sweet fruits and berries do not represent a significant source of carbohydrates in their natural form, and also typically contain a good deal of fiber which attenuates the absorption of sugar in the gut. Most vegetables are low- or moderate-carbohydrate foods in the context of these diets, fiber is excluded because it is not a nutritive carbohydrate. Some vegetables, such as potatoes , have high concentrations of starch, as do maize and rice. Most low-carbohydrate diet plans accommodate vegetables such as broccoli , spinach , cauliflower , and peppers.

Nevertheless, debate remains as to whether restricting even just high-carbohydrate fruits, vegetables, and grains is truly healthy. Contrary to the recommendations of most low-carbohydrate diet guides, some individuals may choose to avoid vegetables altogether to minimize carbohydrate intake. Low-carbohydrate vegetarianism is also practiced. Raw fruits and vegetables are packed with an array of other protective chemicals, such as vitamins, flavonoids , and sugar alcohols. Some of those molecules help safeguard against the over-absorption of sugars in the human digestive system.

Some evidence indicates the increasingly large percentage of calories consumed as refined carbohydrates is positively correlated with the increased incidence of metabolic disorders such as type 2 diabetes. Some evidence indicates the human brain — the largest consumer of glucose in the body — can operate more efficiently on ketone bodies. In , the Canadian government ruled that foods sold in Canada could not be marketed with reduced or eliminated carbohydrate content as a selling point, because reduced carbohydrate content was not determined to be a health benefit.

The government ruled that existing "low carb" and "no carb" packaging would have to be phased out by In , John Rollo reported on the results of treating two diabetic Army officers with a low-carbohydrate diet and medications. A very low-carbohydrate, ketogenic diet was the standard treatment for diabetes throughout the nineteenth century.

In , William Banting , a formerly obese English undertaker and coffin maker, published "Letter on Corpulence Addressed to the Public", in which he described a diet for weight control giving up bread , butter , milk , sugar , beer , and potatoes. In the early s Frederick Madison Allen developed a highly restrictive short term regime which was described by Walter R.

The process was halted if sugar appeared in the person's urine. In , Richard Mackarness M. Mackarness also challenged the "calorie theory" and referenced primitive diets such as the Inuit as examples of healthy diets with a low-carbohydrate and high-fat composition. The "Stillman diet" is a high-protein , low-carbohydrate, and low-fat diet.

It is regarded as one of the first low-carbohydrate diets to become popular in the United States. In , Robert Atkins published Dr.

Atkins Diet Revolution , which advocated the low-carbohydrate diet he had successfully used in treating patients in the s having developed the diet from a article published in JAMA. The concept of the glycemic index was developed in by David Jenkins to account for variances in speed of digestion of different types of carbohydrates. In the s, Atkins published an update from his book, Dr.

Atkins New Diet Revolution , and other doctors began to publish books based on the same principles. This has been said to be the beginning of what the mass media call the "low carb craze" in the United States. In the United States, the diet has continued to garner attention in the medical and nutritional science communities, and also has inspired a number of hybrid diets that include traditional calorie-counting and exercise regimens.

From Wikipedia, the free encyclopedia. This is the latest accepted revision , reviewed on 12 September Not to be confused with slow carb diet. This article is about low-carbohydrate diets as a lifestyle choice or for weight loss. For low-carbohydrate dietary therapy for epilepsy, see Ketogenic diet. This article has multiple issues.

Please help improve it or discuss these issues on the talk page. Learn how and when to remove these template messages. This article needs more medical references for verification or relies too heavily on primary sources. Please review the contents of the article and add the appropriate references if you can. Unsourced or poorly sourced material may be challenged and removed. Just as with still existing hunters and gatherers, there were many varied "diets"—in different groups—and also varying through this vast amount of time.

Some paleolithic hunter-gatherers consumed a significant amount of meat and possibly obtained most of their food from hunting, [] while others are shown as a primarily plant-based diet, [62] Most, if not all, are believed to have been opportunistic omnivores.

There's evidence of Paleolithic people killing and eating seals and elands as far as c. On the other hand, buffalo bones found in African caves from the same period are typically of very young or very old individuals, and there's no evidence that pigs, elephants, or rhinos were hunted by humans at the time. Paleolithic peoples suffered less famine and malnutrition than the Neolithic farming tribes that followed them.

Large-seeded legumes were part of the human diet long before the Neolithic Revolution , as evident from archaeobotanical finds from the Mousterian layers of Kebara Cave , in Israel. Upper Paleolithic cultures appear to have had significant knowledge about plants and herbs and may have, albeit very rarely, practiced rudimentary forms of horticulture.

In some instances at least the Tlingit , they developed social stratification , slavery , and complex social structures such as chiefdoms. A modern-day diet known as the Paleolithic diet exists, based on restricting consumption to the foods presumed to be available to anatomically modern humans prior to the advent of settled agriculture. From Wikipedia, the free encyclopedia. Mousterian — ka Aterian c. Life timeline and Nature timeline. Some of this article's listed sources may not be reliable.

Please help this article by looking for better, more reliable sources. Unreliable citations may be challenged or deleted.

February Learn how and when to remove this template message. Between Nothing and Everything. Winfried; Hardt, Thorolf; Tatersall, Ian. Berlin; Heidelberg; New York: Science and Technology in World History: Global Ecology and Biogeography. University of California Museum of Paleontology. Retrieved 22 August The Earth has been in an Ice House Climate for the last 30 million years. New Views on an Old Planet: A History of Global Change. Retrieved February 14, Walker's Mammals of the World.

Johns Hopkins University Press. Lifelines from Our Past: A New World History. A Global History from Prehistory to the Present. Ideas that changed the world. Journal of Archaeological Science.

University of Chicago Press. Archived from the original PDF on Archived from the original on Contributed by Richard B. Hafting, projectiles and Mousterian hunting". The Nature of Paleolithic art. Origins and History of the Passions of War. Warless societies and the origin of war. University of Michigan Press, Lecture 8 Subsistence, Ecology and Food production. Retrieved February 13, The Woman in the Shaman's Body: Reclaiming the Feminine in Religion and Medicine.

New Developments in Consciousness Research. New York, United States: University Of Chicago Press, When God Was a Woman.

The origin of man. Archived from the original PDF on 28 September Retrieved 1 December Britannica online encyclopedia The Prehistory of the Mind: From earth spirits to sky gods Socioecological Origins of Monotheism.

Retrieved March 13, Archaeologist Traces Drink to Stone Age". J Nutr Environ Med. Evidence from plant remains". Eur J Clin Nutr. From Lucy to Language: Revised, Updated, and Expanded. Retrieved 23 December Aiello; Peter Wheeler Archived at the Wayback Machine. The Known, the Unknown, and the Unknowable.

Cooking and the Ecology of Human Origins". Boyd Eaton; Stanley B. Sinclair; Loren Cordain; Neil J. World Rev Nutr Diet: Journal of environmental medicine. Hunger an unnatural history. In Ungar, Peter S. Its Origins and Evolution. Am J Clin Nutr. Claims that you will lose only fat are not based on science despite the fact that the Atkins diet claims to be scientifically based. The Pritikin diet is a very low-fat, high-carbohydrate eating plan.

The focus is to eat vegetables, fruits, and high-fiber grains. Nathan Pritikin's diet is based on the theory of eating low-fat, low-calorie, plant-based foods to promote weight loss and improve or prevent heart disease. The revised Pritikin diet includes a "Calorie Density Solution: Eating low-calorie foods throughout the day will reduce hunger and cause weight loss.

Research has shown that the calorie density of our diets will impact our weight. The calorie density is the amount of calories in a given weight of food. Consuming foods that are considered low-calorie dense aids in weight loss. These foods will provide a high volume without a lot of calories.

By replacing foods that are considered high-calorie dense, you save additional calories. Some find it more satisfying to focus on consuming low-calorie dense foods in large quantities versus counting calories. The Pritikin diet also encourages daily exercise and stress -reduction techniques. The most controversial part of this diet is the severe fat restriction. There has been a considerable amount of research showing the health benefits of omega-3 fats, including protecting your heart.

The American Heart Association now recommends that people without coronary heart disease eat a variety of omega-3 fat-containing fish at least twice a week and that those with coronary heart disease consume one gram of omega-3 fats per day.

Dietary fat is also needed to transport the fat-soluble vitamins A, D, E, and K. Without fat to transport them, they will not be able to serve their functions in your body.

Our diets are meant to have a balance of protein, carbohydrates, and fat. When you consume too little of one of these nutrients it means you are consuming too much of another nutrient. Most people who follow a very low-fat diet end up consuming an excess amount of carbohydrates. Too much of any nutrient can cause health problems. The Dietary Reference Intake DRI established the need for each one of these nutrients based on research for optimal health and weight.

If you follow the Pritikin Principle it would be best to adjust your intake to meet the DRI guidelines. The Zone diet is a high-protein, low-carbohydrate, fat-controlled eating plan. It is not as restrictive as other high-protein diets and it allows for a broad range of foods to be consumed.

A small amount of protein is combined with twice the amount of "favorable" carbohydrates, including fruits and vegetables. If choosing "less desirable" carbohydrates, the portion size is smaller. Sears' Zone diet is based on the theory that the human body is genetically programmed to reach peak efficiency when all meals, including snacks, consist of a set caloric ratio of carbohydrates, proteins, and fats.

When this ratio is achieved, the body is working within the "zone. The Zone diet promotes eating a balance of each nutrient, without severely restricting calories. Protein increases your feeling of fullness, helping you to avoid eating between meals, and there is a guide to what kind of fat you can consume.

Healthy fats are encouraged in place of the saturated and trans fats. The calorie restriction will help you lose weight. The claims made about the health implications of carbohydrates and protein are controversial.

As with other fad diets, one nutrient is being made to look like the enemy carbohydrates , while protein is made to look like the key to weight loss and health. Most diets that are against carbohydrates use the arguments that we consume less fat and more carbohydrates than we did 10 years ago, and obesity is on the rise.

This is half true. We consume more carbohydrates, which means we consume more calories. Our fat intake remains above the recommendations, but the percent of our total calories from fat has come down because we are now consuming more calories.

Again, research clearly shows that a balance of each of these nutrients is needed and that an excess or deficiency in any of them will cause problems. This diet can be difficult to stick with long-term, so weight regain can be an issue. The South Beach Diet. The South Beach diet is the newest high-protein, low carbohydrate, and fat-controlled diet. This diet claims that the cause for obesity "is simple: The faster the sugars and the starches you eat are processed and absorbed into your bloodstream, the fatter you get.

The first phase claims to eliminate cravings and kick-start weight loss; the second phase is for long-term, steady weight loss; and the third phase is to be followed for days a year once you have achieved your weight loss goal. The second and third phases of this diet promote a balanced diet that can be beneficial to your health and weight. These phases promote consistent meal times, healthy snacks and desserts, and water.

The meal plans and recipes can be useful for those who need some guidance on what to eat. There are now six other books and an interactive web site supporting this plan.

The theory behind the diet is not the reason you will lose weight if you follow this plan. Weight loss can only occur when you consume fewer calories than your body needs.

In the introduction chapter the author makes numerous claims that you do not need to limit the quantity of food that you consume and then provides portion restrictions on many high calorie foods, such as nuts. It's appealing to hear you can eat unlimited quantities, but weight loss will not be achieved without limitations. The initial phase of this diet should be avoided. This two-week phase claims to produce a weight loss of eight to 13 pounds with severe dietary restrictions; including fruit, dairy, and starches.

Phases like this are usually included so people see quick results, but are limited in time because they are not nutritionally balanced and can't be followed for a long period. It tends to be more discouraging than motivating to lose quickly and to feel like you are "on a diet.

It's best to begin slowly and to always consume a nutritionally balanced diet. Eat more, weigh less: Eat More, Weigh Less is one of the few diets developed as a result of research.

The primary goal of this diet was to reverse heart disease. The basis for this diet is to consume a high-fiber, low-fat, vegetarian diet with limited amounts of dairy foods. The goal is to consume primarily complex carbohydrates vegetables, fruit, and whole grains , low total fat primarily from omega-3 fatty acids and limited in saturated fat, and low sugar.

Physical activity and stress management are also emphasized. The research does support the health benefits of this diet, and you will lose weight if you stick with the plan. The web site provides recipes and detailed information on nutrition , exercise, and stress management.

The primary con to this diet is that it can be extremely limited and difficult for some people to follow. This limitation is because meat is omitted from the plan. Cutting out an entire food group may be too much of a restriction to maintain over the long-term, so some people do best by modifying this diet to allow for a moderate amount of meat.

The high fiber intake may also pose a problem initially. It's best to slowly increase the amount of fiber you consume so your body can get used to it. The goal is always long-term weight loss and maintenance.

This diet does have the research to support it, but it may need modifications to make it work for you. Jenny Craig has become best-known for the celebrities who are followed while losing weight on this diet. They explain how easy it is and how delicious the food is, and you see the results as they are happening. This diet provides you with your foods and snacks to ensure you consume the exact amount of calories your body needs to lose weight. You add fresh produce and dairy.

You meet with a consultant on a weekly basis to discuss your progress, and who will assist you with transitioning to your own food when you are ready to do so. Physical activity is emphasized throughout the diet. The primary advantage to this diet is that you will lose weight if you eat what you are given. Portion-and-calorie-controlled meals are great tools for long-term weight loss and maintenance. They take away the guesswork of how many calories you consume, they can be nutritionally balanced, they are quick and easy to prepare, and they teach you about healthy portion sizes.

As with all diets, nothing works for everyone, and nothing works forever. The celebrity endorsements are great when they work, but the celebrities who regain their weight once they discontinue this plan are proving that this is not the answer for everyone. Many people prefer to be able to eat food they prepare and do not like the idea of prepackaged foods. The consultants are not professionals in this field. They undergo a training course but are not trained therapists, registered dietitians, or exercise physiologists, so the advice and support that you receive will be limited to what they have been taught to say.

If you are taking any medications or have any health conditions, it is best to work with trained professionals. The NutriSystem Advanced diet is a low glycemic index , high-fiber, and high-protein diet. The prepackaged food is provided for you by ordering online or by calling the toll free number. This diet does address the three necessary components for successful weight loss and maintenance; diet, physical activity, and behavior. Prepackaged foods can be an effective tool for weight loss.

You will be provided with the appropriate number of calories for weight loss without having to worry about counting anything.

Dangers of Fasting for Weight Loss