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Come on now...we have all done it. You know the feeling. You are walking down an aisle in the supermarket craving “bad”. Instead of going for the Oreo cookies you feel are loaded with fat, you opt for the Snackwells Fat Free Devils Food Cake Cookies and feel like you are a saint for making the least harmful choice. You feel great...that is until you get home, open the package, eat one cookie, then two...then in a matter of minutes the whole box has been consumed. But you think, its not that bad...no fat!!!! But, what about everything else in that box???
In the last couple of decades, dieting trends have astronomically increased. The average dieter has trained his or her ears and eyes to react to the word ‘fat’. Low fat, reduced fat, fat free- these are all words that until recently have set alarms off ringing in the typical dieter’s head. Recently, new vocabulary, such as ketogenic, ketosis, and low carbohydrate have stepped into the dieter’s world and questioned, or rather challenged, the ‘fat’ free method of dieting. So, after you have devoured the entire box of ‘fat’ free cookies perhaps you will ask yourself....WHAT ABOUT THE CARBOHYDRATES???
Ketogenics...Low-Carbohydrate...Ketosis...what does all this mean?
Ketogenic diets, often called low-carbohydrate (low carb is slang), seem to be the latest diet trend. There are many different forms, all varying in different degrees. Ketogenic diets focus primarily on the limited intake of carbohydrates in the food pyramid. In order to clearly understand ketogenic diets, one must start with the basics-what are ketones and where are ketones found and produced???
What are ketones
Ketose is any sugar that contains a ketone group. Ketone bodies are the normal physiological defenses in starvation. Ketone bodies are normal products of lipid and pyruvate and found within the liver. When an impaired or absent carbohydrate intake occurs, the body increases its production of ketone bodies and metabolizes them as an energy source. Ketogenesis, which is the production of ketone bodies occurs in ketogenic diets, resulting in a ketotic state( Miller-Keane 1997). So, “when the requirement for glucose cannot be met by other means, the tissues of the body rely increasingly on ketone bodies as an energy source” (Volpe 1983).
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what are ketogenic diets
what is the purpose of a ketogenic diet
Ketogenic diets claim to help a variety of conditions ranging from epileptic seizures to obesity to high blood pressure. The concept of ketogenic diets is pretty basic. The notion behind ketogenics is designed to minimize carbohydrate and protein intake and maximize fat intake. “The diet is high in fat, and low in carbohydrate and protein, which results in ketosis” (http://www.netphonic.com/demo/stanford/faxdos/ketoprotoc.html). This idea is that once carbohydrate intake is limited then positive effects will result. Ideally, these positive effects will help alleviate the health concern at hand. Ketogenic diets seem to appeal the most to those interested in weight loss and epileptic seizures.
Ketogentic diets for the purpose of weight loss
Ketogenic diets have recently inched into the dieter’s spotlight as a new trend guaranteed to facilitate weight loss. The idea behind this is that as one limits his or her carbohydrate intake, cravings for those carbohydrates will diminish, and thus, the dieter will consume fewer calories. As the dieter’s caloric intake lowers weight loss will occur. This diet is designed to target those of us who are “frequently depicted as being driven by ‘carbohydrate cravings’” (Fairburn 1993). Those who suffer from ‘carbohydrate cravings’ crave food high in carbohydrates, such as pasta, bread, potatoes, sugar, etc. at a rate that is sometimes believed to be excessive. But, if these foods are eliminated, the result will be a consumption of fewer calories, essentially, tricking one’s mind into limiting the calories by limiting the food allowed according to the diet. There are several of these diet plans available and almost all of them require purchasing books and/or products in the process. The majority of these diets claim to increase fat burning and stabilize blood sugar levels. One such plan, “The Atkins Diet” by Dr. Richard Atkins, claims if one “limits the body’s carbohydrate intake, the body must turn to its own fat storage for the energy it needs to function throughout the day” (http://www.atkinscenter.com/diet101.html). It goes on further to claim that “Atkins Dieters rarely eat when they’re not really hungry, have increased mental clarity throughout the day, maintain consistent energy levels and even tend to need less sleep” (http://www.atkinscenter.com/diet101.html). Other diet plans that are similar to the notion of ketogenic diets are:
-Dr. Barry Sears, “Entering the Zone”
-Drs. Mary and Michael Eades, “Protein Power”
-Grant Magnuson, “Stone and Spear”
-Ray Audette, “NeanderThin”
These diets, along with many others, are easily accessible and can be located through
Ketogenic diets for the purpose of controlling epileptic seizures
Ketogenic diets are also believed to be beneficial in controlling epileptic seizures, specifically in children. The Ketogenic Diet claims to create a “ketotic state which exerts an antiepileptic effect” (http://www.netphonic.com/demo/stanford/faxdocs/ketoprotoc.html). For this purpose, a ketogenic ratio of 4:1 based on FAT:PROTEIN plus CARBOHYDRATES is established. This notion behind this is that the proper ratio of fat to protein plus carbohydrates will result in a dramatic decrease in seizures. The magic number, if you will, is calculated precisely and then divided into allotments of three or four meals. These diets, similar to those intended for weight loss are “high in fat, and low in carbohydrates and protein, which result in ketosis...fluids are also limited” (http://www-leland.stanford.edu/group/ketodiet/FAQ..html). Usually the ketogenic diet is used as a method secondary to anti-seizure medications. Children are often hospitalized in order to initiate the diet safely. They are given a keto team, which involves parents, doctors, dietitians, and pharmacists. For a partial list of centers and programs that are offered in the ketogenic diet contact:
Are ketogenic diets effective
The Web harbors endless amounts of information on ketogenic diets used for both weight loss and epileptic seizure control. A great deal of information is testimonials by dieters and parents of epileptic children claiming the success they have experienced with ketogenic diets. Dieter testimonials include “a feeling of well being and comfort, an increase in energy level, and large amounts of weight loss” (http://www.leanforlife.com/ketosis.htm). Dieters claim this is “the most incredible weight-loss breakthrough ever” and argue that this diet allows one to enjoy “bacon,eggs, cheese, steaks, sausage, cream, mayonnaise, butter, and much more” (http://members.aol.com/regul8in/Ketosis.htm). Some diets state a specific amount of weight loss per week, such as the Ketosis Diet by Maymac Enterprises in which you are guaranteed to loose “seven to ten pounds per week, eating all the rich delicious foods you want”. This diet goes on to claim that “on this diet you will only lose fat, not valuable muscle tissue” (http://members.aol.com/regula8in/ketosis.htm)!
Additionally, the Web contains an influx of information on ketogenic diets used to control seizures. Much of this information is of similar style to weight loss diet plan. Testimonials from parents claiming ketogenic diet success fill page after page, while support group sign ups and visitor registrations also appear. Web sites solely established for successful testimonials exist as well. Like the ketogenic diets designed for weight loss, the web also contains various documents on diets used to treat seizures by specialists from health centers. These papers seem to be more scientifically based, thus more believable. However, a fancy name and fluffy terms do not offer definite proof. Sights such as the Packard’s Children’s Hospital at Stanford University Medical Center provide tremendous amounts of information; however, are not scientifically cited. They can be visited at:
Scientific facts about ketogenic diets and weight loss
As opposed to the advertising techniques and sale pitches that seem to overwhelm one while ‘surfing the Web’ about ketogenic diets, reports of well-designed, well-researched, empirically sound, scientific literature regarding ketogenic diets have been published in many valid medical journals. The conclusions support most of the claims on the Web for both weight loss and seizure control; however, these studies focus more on the long-term effects, rather then short-term, as well as health concerns and additional skepticism. Nevertheless, the research does indeed scientifically challenge some of the more extreme claims.
According to the experts, diets that limit carbohydrate intake do result in weight loss. “The carbohydrate content of the reducing diet may play an important role in the metabolic changes that occur during weight reduction” (Racette 1995). Most scientific research in this field examines weight loss in terms of low carbohydrate diets verses low fat diets. Reports state that weight loss is more rapid when the carbohydrate intake is low as opposed to the fat intake. “Diet composition influenced total weight loss, with subjects on the low carbohydrate diet losing greater amounts of weight than those on the low fat diet” (Racette 1995). However, research also indicates that “ketogenic diets are very inconsistent” (Wing 1995). Laboratory studies further state that while ketogenic diets result in weight loss, it is temporary if normal eating habits are resumed and the diet is the only means of weight reduction. In order to achieve optimal, long term weight loss, as well as ideal body health, a regiment of healthy dieting must be maintained as a lifestyle along with a regular amount of exercise (Racette 1995).
Scientific facts about ketogenic diets and seizure control
Ketogenic diets were initially researched in the 1920s as a treatment option for those with intractable epilepsy. As a result of new age medications the diet’s popularity decreased significantly; however, has recently surfaced again as a successful therapy. The majority of the research in this field has been centered around children. Research states that “children who respond to the diet usually become more alert and many are able to gain or regain developmental milestones” (Fiechtner 1995). Empirically sound evidence states that “starvation exerts an anticonvulsive effect. It is assumed that ketones, generated by fasting or with a ketogenic diet, contribute to this therapeutic effect” (Lamers 1995). Ketogenic diets used in an attempt to control seizures are usually accompanied with medications as well. Research indicates that the slightest deviation from the diet can cause the ketosis to drop, and seizures to resume. Many of the uncounted carbohydrates are supplied in the form of oral liquid medications. As a result, research has been conducted in an attempt to reduce the occurrence of children regaining seizures despite following the strict diet (Feldstein 1996). Within these studies it has been determined that “tablet and capsule formulations usually contain much lower carbohydrate amounts than liquid formulations and are preferred when possible” (Feldstein 1996). Research further supports much of what the Web claims in that in order for seizures to decrease a 4:1 ketogenic ratio of FAT:PROTEIN plus CARBOHYDRATE must be maintained at every meal. It is also essential to monitor not only medication components, but also that of toothpaste, mouthwash, gum, etc. (Lamers 1995). Studies also indicate that although products claim to be sugar-free, they can contain sorbitol which contains significant quantities of other carbohydrates. (Feldstein 1996).
What are the effects of ketogenic diets
What are the unknowns
As previously stated, the main effect of ketogenic diets is the body state of ketosis. Ketosis is “characterized by a build up of chemicals known as ketones, which are produced by the body as a by-product of combusting fat” (Leung 1995). This can lead both the dieter and children with epileptic seizures to feel tired and lethargic. More specific to children with epilepsy, symptoms can include “nausea, weakness, increase in sweating, and dizziness” (http://www.netphonic.com/demo/stanford/faxdocs/ketoprotoc.html). If this occurs the child should be given a small, specified amount, like 15-30 cc of orange juice, in an attempt to prevent ketosis. Additional side effects include gas, constipation, and specific breath odor. Excessive ketosis can result in crankiness and irritability as well. As the ketotic states are eliminated by the intake of carbohydrates the dieters report and research indicates that the positive weight loss diminishes, and inevitably weight gain results (Wing 1995). Furthermore, unknowns regarding effects of ketogenic diets continue to be researched. Mood and cognitive performance were thought to be affected by ketosis; however, studies such as one done by H. Lloyd conclude that further research must be completed in order to determine such unknowns.
As a dieter, yes, a strict ketogenic diet, limiting carbohydrates and protein, will result in weight loss. However, this weight loss has been proven to be short term and once normal eating habits reappear, so does the weight. Researchers continue to study the effects, both positive and negative of ketogenic diets. In terms of weight loss, ideal maintenance will result from a diet of moderation, lifestyle changes, and regular exercise. The ketogenic diets used for seizure control recommend children to be released from the diet after a maximum of two years. While ketogenic diets have indicated the occurrence of fewer seizures, medications also warrant positive results. As medical breakthroughs and new diet fads continue to surface, one must be wary and research thoroughly before taking on unhealthy risks.
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Vazquez, Jorje, and S. Adibi. "Protein sparing during treatment of obesity: ketogenic versus nonketogenic very low calorie diet". Metabolism. 41(4): 406-414, April 1994.
Volpe, Peter E. Biology and Human Concerns. Wm. C. Brown Publishers, Iowa, 1993.
Wing, R.R., J. Vazquez and C. Ryan. "Cognitive effects of ketogenic weight reducing diets". International Journal of Obesity and Related Metabolic Disorders. 19(11): 811-16, November 1995.