Study Raises Doubts About Intermittent Fasting


Losing weight through interval fasting is the key to a slim figure for many. But a new study questions the effectiveness of the diet now.

Many people who would like to reduce their weight, fast and durably, decide to give Intermittent Fasting a shot – because the method it all over the media right now. Over a certain period to a large extent one does without the calorie supply, while otherwise normally one can eat.

But is this popular form of fasting, with which it concerns always only a temporary renouncement, really as effective as thought? A new study seems to prove the opposite.

Which methods of the interval fasting are there:


The methods how interval fasting is operated differ considerably. With the “two day diet”, developed by┬ánutritionist Dr Michelle Harvie together with the Oncologists Professor Tony Howell, is limited approximately on two sequential days in the week the energy supply to 650 kilocalories. Low-carbohydrate and high-protein food is to be preferred on these days.


The “5:2 diet”, which was developed by Dr Michael Mosley in 2013, follows a different path. Here two fasting days per week are set, which however do not follow each other, but for example always lie on a Wednesday and a Sunday. On these days, the energy intake via food and drinks should only be a quarter of the conventional amount. Vegetables and whole grain products are to take over the main role on the menu on the chamfering days.


Alternating fasting also has a large following. With this method chamfered days alternate with the days, on which can be eaten after desire and mood. On the fasting days the person must do however without 75 per cent of the used food admission.


The probably best known form of interval fasting is “Dinner Skipping” or “Dinner Cancelling”. Here on two to three days in the week one does without the dinner. Only alcohol-free beverages are permitted.

New study wakes doubts

Doubts about the effectiveness of interval fasting are now however raised by a study of the University of California, San Francisco.

Scientist & Cardiologist, Ethan Weiss, compared two experimental groups of overweight subjects. One group was able to eat three balanced meals a day and a certain amount of snacks between meals. The amount of calories was thus limited, but the period of intake was not. All other participants submitted to the 16:8 diet. With this method, food may only be eaten between 12:00 and 20:00 in normal quantities. In the remaining time only low-calorie drinks were allowed. After twelve weeks the results were settled and the result was sobering. While the 16:8 group recorded a weight loss of 0.94 kilograms, the other test persons lost 0.7 kilograms. The difference was therefore negligible. The study suggests that a balanced regulated diet can help to lose weight permanently just as much as the popular interval chamfering. It depends thus on what one eats and not when one eats it.

White, which accomplished the investigation, decided in any case for himself to end interval fasting after seven years. He announced this on his Twitter account.

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