Very Low Calorie Diets.
Selasa, 05 Juli 2011 by Android Blackberry
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| Very Low Calorie Diets. |
Really low calorie diet (VLCD) is usually a diet with pretty or particularly low everyday food energy consumption. It is defined medically as a diet of 800 kilocalories (3,300 kJ) per day or less. VLCDs are formulated, nutritionally complete, liquid meals containing 800 kilocalories or less per day. VLCDs also contain the recommended daily requirements for vitamins, minerals, trace elements, fatty acids and protein. Carbohydrate may be entirely absent, or substituted for a portion of the protein; this choice has important metabolic effects.The VLCD products are usually a powder which is mixed with water or another low-food-energy liquid. The VLCD is prescribed on a case to case basis for rapid weight loss (about 1.5 to 2.5 kilograms or 3 to 5 pounds per week) in patients with Body Mass Index of 30 and above. The health care provider can recommend the diet to a patient with BMI between 27 and 30 if the medical complications the patient has due to overweight present serious health risk.
Health benefits
A 1997 study concludes that the short-term use of a VLCD is very effective in rapidly improving glycaemic control and promoting substantial weight loss in obese patients with Type 2 diabetes. Moreover, a VLCD increases insulin sensitivity and reduces the substrate for gluconeogenesis. Thus VLCD treatment may improve glycaemic control more than calorie restriction alone. A VLCD is typically undertaken by an obese patient who wishes to lose a lot of weight quickly, as the risk to health that obesity presents is considered much greater than any risks of the diet itself, so long as it is undertaken with medical supervision.
Adverse effects
Studies have shown that in about one in four individuals following a VLCD for a few months, gallstones develop. However, these gallstones may be small enough to not cause discomfort, and often disappear when a normal eating pattern is resumed.Gallstone formation is facilitated by the more concentrated bile fluid and reduced flow as a result of a VLCD. Another potential side effect is constipation (depending on the fiber content of the diet). Most VLCDs recommend drinking 5 litres of water a day to nullify this effect.
- What's a very low-calorie diet?
- Who ought to use a VLCD?
- Health Advantages of a VLCD
- Adverse Effects of a VLCD
- Maintaining Weight loss
- Extra Reading
- What exactly is a really low-calorie diet plan?
A very low-calorie diet plan (VLCD) can be a doctor-supervised diet that typically uses commercially prepared formulas to promote rapid weight reduction in patients who are obese. These formulas, often liquid shakes or bars, replace all food intake for quite a few weeks or months. VLCD formulas must contain proper levels of vitamins and micronutrients to make sure that patients meet their nutritional requirements. Some physicians also prescribe VLCDs produced up nearly entirely of lean protein foods, for example fish and chicken. People today on a VLCD consume about 800 calories per day or much less.
VLCD formulas aren't the same as the meal replacements you are able to find at grocery shops or pharmacies, which are meant to substitute for 1 or two meals a day. Over-the-counter meal replacements for example bars, entrees, or shakes, must account for only part of one’s every day calories.
When employed under appropriate medical supervision, VLCDs may create substantial short-term weight loss in patients who are moderately to really obese. VLCDs will need to be part of comprehensive weight-loss treatment programs that consist of behavioral therapy, nutrition counseling, physical activity, and/or drug treatment.
Who must use a VLCD?
A quite low-calorie diet plan is often a doctor-supervised diet that ordinarily utilizes commercially prepared formulas to promote rapid weight loss in patients who are obese.
VLCDs are developed to generate rapid weight reduction at the start off of a weight-loss program in patients with a body mass index (BMI) greater than 30 and substantial comorbidities. BMI correlates drastically with total body fat content. It really is calculated by dividing a person’s weight in pounds by height in inches squared and multiplied by 703.
Use of VLCDs in patients with a BMI of 27 to 30 really should be reserved for people who have medical conditions as a result of overweight, including high blood pressure. The fact is, all candidates for VLCDs undergo a thorough examination by their wellness care provider to create positive the diet won't worsen preexisting medical conditions. Lastly, these diets are not appropriate for youngsters or adolescents, except in specialized treatment programs.
Incredibly small details exists concerning the use of VLCDs in older adults. Because adults over age 50 already encounter depletion of lean body mass, use of a VLCD may possibly not be warranted. Also, folks over 50 may well not tolerate the side effects related with VLCDs because of preexisting medical conditions or the require for other medicines. Physicians ought to evaluate on a case-by-case basis the potential risks and positive aspects of rapid weight loss in older adults, as well as in patients who've significant medical troubles or are on medicines. In addition, doctors must monitor all VLCD patients regularly-ideally every single 2 weeks within the initial period of rapid weight loss-to be sure patients aren't experiencing serious side effects.
Health Benefits of a VLCD
A VLCD may possibly allow a patient who's moderately to extremely obese to lose about three to 5 pounds per week, for an average total weight loss of 44 pounds over 12 weeks. Such a weight reduction can rapidly boost obesity-related medical conditions, which includes diabetes, high blood pressure, and high cholesterol.
The rapid weight reduction experienced by most people on a VLCD is often incredibly motivating. Patients who participate in a VLCD program that consists of way of life treatment commonly lose about 15 to 25 percent of their initial weight throughout the very first 3 to 6 months. They may maintain a 5-percent weight loss right after 4 years if they adopt a healthy eating program and physical activity habits.
Adverse Effects of a VLCD
Numerous patients on a VLCD for 4 to 16 weeks report minor side effects for example fatigue, constipation, nausea, or diarrhea. These conditions often improve within some weeks and rarely prevent patients from completing the program. By far the most typical significant side effect is gallstone formation. Gallstones, which often create in people who are obese, specially ladies, are even far more widespread during rapid weight reduction. Research indicates that rapid weight reduction could boost cholesterol levels in the gallbladder and decrease its ability to contract and expel bile. Some medicines can prevent gallstone formation throughout rapid weight reduction. Your wellness care provider can ascertain if these medicines are proper for you
Maintaining Weight loss
Studies show that the long-term outcomes of VLCDs vary widely, but weight regain is widespread. Combining a VLCD with behavior therapy, physical activity, and active follow-up treatment may well assist enhance weight loss and stop weight regain.
In addition, VLCDs could be no extra effective than much less severe dietary restrictions within the lengthy run. Studies have shown that following a diet plan of approximately 800 to 1,000 calories produces weight reduction similar to that seen with VLCDs. This is probably due to participants’ greater compliance having a less restrictive diet plan.
For many individuals who are obese, their condition is long-term and needs a lifetime of attention even after formal weight-loss treatment ends. Thus, health care providers really should encourage patients who're obese to commit to permanent changes of healthier consuming, regular physical activity, and an improved outlook about food
Endnote: This reality sheet is an updated, modified version of a previously published review write-up appearing inside the August 25, 1993 problem of the Journal of the American Medical Association. Both the review article and this reality sheet had been developed using the suggestions of the Clinical Obesity Research Panel, formerly identified as the National Job Force on Prevention and Treatment of Obesity.
Very Low Calorie Diets.
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