Tuesday, July 8, 2008

The Atkins Diet

One of the most controversial diets ever.

"Atkins Nutritional Approach, popularly known as the Atkins Diet or just 'Atkins', is a well-known low-carbohydrate diet. Dr.Robert Atkins from a diet he read in the Journal of the American Medical Association and utilized to resolve his own overweight condition following medical school and graduate medical training. He later popularized the Atkins diet in a series of books, starting with Dr. Atkins' Diet Revolution in 1998. In his revised book, Dr. Atkins' New Diet Revolution, some of his ideas, but remained faithful to the original concepts.

The Atkins franchise, a business formed to provide products to those individuals on the diet, was highly successful due to the popularity of the diet, and is considered the driving entity of the larger "low-carb craze". However, various factors led to its dwindling success and the company founded by Dr. Atkins in 1989, Atkins Nutritionals of Ronkonkoma, New York, filed for Chapter 11 bankruptcy in July of 2005, two years after the death of Dr. Atkins. The company re-emerged in January 2006, and the Atkins logo is still highly visible through licensed-proprietary branding for food products and related merchandise.

Nature of the Diet

The Atkins Diet represents a departure from prevailing theories. Atkins claimed there are two main unrecognized factors about Western eating habits, arguing firstly that the main cause of obesity is eating refined carbohydrates, particularly sugar, flour, and high-fructose corn syrups; and secondly, that saturated fat is overrated as a nutritional problem, and that only trans fats from sources such as hydrogenated oils need to be avoided. Consequently, Dr. Atkins rejected the advice of the food pyramid, instead asserting that the tremendous increase in refined carbohydrates is responsible for the rise in metabolic disorders of the 20th century, and that the focus on the detrimental effects of dietary fat has actually contributed to the obesity problem by increasing the proportion of insulin-inducing foods in the diet. While most of the emphasis in Atkins is on the diet, nutritional supplements and exercise are considered equally important elements.

Atkins involves the restriction of carbohydrates in order to switch the body's metabolism from burning glucose to burning stored body fat. This process (called lipolysis) begins when the body enters the state of ketosis as a consequence of running out of excess carbohydrates to burn. Dr. Atkins in his book New Diet Revolution claimed that the low-carbohydrate diet produces a "metabolic advantage" where the body burns more calories, overall, than on normal diets, and also expels some unused calories. He cited one study where he estimated this advantage to be 950 calories (4.0 MJ) a day. However, a review study in the Lancet (see below) concluded that there was no metabolic advantage and dieters were simply eating fewer calories due to boredom. Professor Astru stating that "The monotony and simplicity of the diet could inhibit appetite and food intake." [1], or possibly protein inducing a satiating effect.

The Atkins diet restricts "net carbs" (carbohydrates that have an effect on blood sugar). The effect is to decrease the onset of hunger from low blood sugar. Dr. Atkins says in Dr. Atkins' New Diet Revolution (2002) that hunger is the number one reason why low-fat diets fail. Though studies show the efficacy of the Atkins approach after one year is the same as a low-fat diet, Dr. Atkins claimed that it was easier to stay on the Atkins diet because dieters did not feel hungry or "deprived". Other studies have sited that the 'low fat' trend which portrays the myth that fat in the food somehow transfers to fat in the body, do not mention the essential amino-acids which are essential in brain function and precursors to serotonin and other neurotransmitters. One study goes as far as comparing the low fat trend with the increase in diagnosed depression over the last two decades.

Net carbohydrates can be calculated from a food source by subtracting sugar alcohols and fiber (which are shown to have a negligible effect on blood sugar levels) from total carbohydrates. Sugar alcohols need to be treated with caution, because while they may be slower to convert to glucose, they can be a significant source of glycemic load and can stall weight loss. Fructose (eg, as found in many industrial sweeteners) also contributes to caloric intake, though outside of the glucose-insulin control loop.

Preferred foods in all categories are whole, unprocessed foods with a low glycemic load. Atkins Nutritionals, the company responsible for marketing the Atkins Diet, recommends that no more than 20% of calories eaten while on the diet come from saturated fat."
from Wikipedia

The debate over this diet still looms but the important thing to keep in mind is that most doctors do not like the idea of telling people you can eat whatever fatty foods you want. This diet is not meant to taken advantage of. You must still keep in mind good nutrition. The Atkins Diet is basically saying we eat to many carbohydrates and too much refined sugar. Their are four phases - the induction, ongoing weight loss, pre-maintenance and also lifetime maintenance.

The Phases

Induction

"The Induction phase is the first, and most restrictive, phase of the Atkins Nutritional Approach. It is intended to cause the body to quickly enter a state of ketosis. Carbohydrate intake is limited to 20 net grams per day (grams of carbohydrates minus grams of fiber, sugar alcohols, or glycerin), 12 to 15 net grams of which must come in the form of salad greens and other green vegetables (broccoli, green beans, spinach and asparagus). The allowed foods include a liberal amount of all meats, fish, shellfish, fowl, and eggs; up to 4 ounces (113 g) of soft or semi-soft cheese; salad vegetables; other low carbohydrate vegetables; and butter and vegetable oils. Drinking eight glasses of water per day is a must during this phase. Alcoholic beverages are not allowed during this phase.[4] Caffeine is allowed in moderation so long as it does not cause cravings or low blood sugar. If a caffeine addiction is evident, it is best to not allow it until later phases of the diet.[4] A daily multivitamin with minerals is also recommended.

The Induction Phase is usually when many see the most significant weight loss — reports of losses of 5 to 10 pounds per week are not uncommon when Induction is combined with daily exercise.

Atkins suggests the use of Ketostix, small chemically reactive strips used by diabetics. These let the dieter monitor when they enter the ketosis, or fat burning, phase. Other indicators of ketosis include a metallic taste in the mouth, or bad breath.

Ongoing weight loss

The Ongoing Weight Loss (OWL) phase of Atkins consists of an increase in carbohydrate intake, but remaining at levels where weight loss occurs. The target daily carbohydrate intake increases each week by 5 net grams. A goal in OWL is to find the "Critical Carbohydrate Level for Losing" and to learn in a controlled manner how food groups in increasing glycemic levels and foods within that group affect your craving control. The OWL phase lasts until weight is within 10 pounds (4.5 kg) of the target weight. During the first week, one should add more of the induction acceptable vegetables to his/her daily products. For example, 6-8 stalks of asparagus, salad, one cup of cauliflower or one half of avocado. The next week, one should follow the carbohydrate ladder that Dr Atkins created for this phase and add fresh dairy. The ladder has 9 rungs and should be added in order given. One can skip a rung if one does not intend to include that food group in one's permanent way of eating, such as the alcohol rung.

The rungs are as follows:

* Induction acceptable vegetables
* Fresh dairy
* Nuts
* Berries
* Alcohol
* Legumes
* Other fruits
* Starchy vegetables
* Grains

Pre-maintenance

Carbohydrate intake is increased again this time by 10 net carbs a week from the ladder groupings, and the key goal in this phase is to find the "Critical Carbohydrate Level for Maintenance", this is the maximum number of carbohydrates you can eat each day without gaining weight. This may well be above the level of carbohydrates inducing ketosis on a testing stick. As a result, it is not necessary to maintain a positive ketosis test long term.

Lifetime maintenance

This phase is intended to carry on the habits acquired in the previous phases, and avoid the common end-of-diet mindset that can return people to their previous habits and previous weight. Whole, unprocessed food choices are emphasized, with the option to drop back to an earlier phase if you begin to gain weight."
from Wikipedia

Best Regards,
Mike


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