Dangers of Fasting for Weight Loss
Human nutritions and healthy diets. The DASH diet and the control diet at the lower salt levels were both successful in lowering blood pressure, but the largest reductions in blood pressure were obtained by eating a combination of these two i. Two experimental diets were selected for the DASH study and compared with each other, and with a third: The intervention phase followed next; this was an 8-week period in which the subjects were provided the diet to which they had been randomly assigned. The first group of study subjects began the run-in phase of the trial in September while the fifth and final group began in January The real danger lies in staying on the fast for prolonged periods, anywhere from three days to a month.
Typical Fasting Weight Loss Plans
It's true that fasting -- that is, eating little to no food -- will result in weight loss, at least in the short term. But the risks far outweigh any benefits, and ultimately, fasting can cause more harm than good. Some plans allow a few solid foods, but are still called fasts because they provide so few calories. Not all fasts are created equal.
Some can be perfectly safe, such as medical fasts supervised by a physician. Religious and cultural fasts are typically undertaken as an act of devotion, last from hours, and are not intended to promote weight loss. Fasts lasting a day or two are unlikely to be dangerous for most healthy adults. But high-risk people, the elderly, anyone with a chronic disease, pregnant women, and children are advised against any type of fasting.
The real danger lies in staying on the fast for prolonged periods, anywhere from three days to a month. When you dramatically reduce your calorie intake, you will lose weight. But it can also cause all kinds of health problems, including muscle loss. Further, when you start fasting, your body goes into conservation mode, burning calories more slowly. Keep in mind that the initial weight lost on a fast is primarily fluid or "water weight," not fat.
And when you go back to eating, any lost weight usually gets a return ticket back. Not only do most people regain weight lost on a fast, they tend to add a few extra pounds because a slower metabolism makes it easier to gain weight.
Worse, the weight that is regained is likely to be all fat -- lost muscle has to be added back at the gym. Side effects of fasting include dizziness , headaches , low blood sugar , muscle aches, weakness , and fatigue. Apart from only one subject on the control diet who was suffering from cholecystitis, other gastrointestinal symptoms had a low rate of incidence.
Like the previous study, it was based on a large sample participants and was a multi-center, randomized, outpatient feeding study where the subjects were given all their food.
The day intervention phase followed, in which subjects ate their assigned diets at each of the aforementioned sodium levels high, intermediate and low in random order, in a crossover design. The primary outcome of the DASH-Sodium study was systolic blood pressure at the end of the day dietary intervention periods.
The secondary outcome was diastolic blood pressure. Study results indicate that the quantity of dietary sodium in the control diet was twice as powerful in its effect on blood pressure as it was in the DASH diet. As stated by Sacks, F. The DASH diet and the control diet at the lower salt levels were both successful in lowering blood pressure, but the largest reductions in blood pressure were obtained by eating a combination of these two i. The hypertensive subjects experienced an average reduction of From Wikipedia, the free encyclopedia.
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. Department of Agriculture and U. Department of Health and Human Services Retrieved December 15, Department of Health and Human Services. News Reveals Best Diets Rankings for ".
The New England Journal of Medicine. A meta-analysis of individual data for one million adults in 61 prospective studies". Southern California Urology Institute. Retrieved 21 April From Clinical Trial to Dinner Table". Cleveland Clinic Journal of Medicine. The Cleveland Clinic Foundation. National Heart, Lung, and Blood Institute.
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