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Dangers of Fasting for Weight Loss

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WebMD archives content after 2 years to ensure our readers can easily find the most timely content. To find the most current information, please enter your topic of interest into our search box. Fasting is an age-old practice, often done for religious reasons, but fasting for weight loss is still capturing the public imagination. You can find dozens of do-it-yourself plans touting the unproven benefits of fasting, ranging from flushing "poisons" from the body to purging 30 pounds of fat in 30 days.

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.

Share your thoughts with other customers. Write a customer review. Read reviews that mention lose weight weight loss taste like noodle soup granola bar chicken noodle chocolate sandwich meal plan food tastes lose about 5 pounds snacks diet dinners included dinner breakfast eat eating exercise lunch. There was a problem filtering reviews right now.

Please try again later. Haven't become a full-fledged member yet. But I did enjoy the 5 breakfasts, lunches and dinners.

Eager to go all-the-way with the monthly subscription, but not just yet. Will try these "sampling" boxes for now. And, yes, I did lose about 5 pounds with my 5-day box. Admittedly, I did have to exercise some self-control and not go beyond the portions provided, but it was fun meeting the 5-day challenge to stick to the plan.

Are you ready for Windy Pops? I am pulling myself out of denial and decided I needed to lose weight and have had a few people recommend Nutrisystem.

New Year's resolution here i come so I placed my order online with Nutrisysystem I turned to Amazon for help!!!! I ordered the 5 day kit to get started while I waited for my big box to arrive adn it came the next day. This box does NOT include dinner, which is why it is cheaper than other 5 day boxes. I like most of the food, but have realized I am not a "bar" person. I'd rather have soup than a trail mix bar as it just doesn't seem like a meal.

You are also supposed to supplement your lunch with non-starch vegetables. The diet was a big adjustment as you are supposed to eat 6 small meals a day and I have trouble finding time to do that. I found myself getting hangry at times.

Nutrisystem puts a lot of fiber in their food to keep you full. If you're a man, it might make you fart. My body is not used to this so as a woman I got the windy pops Women don't fart. I did weight myself at the beginning and after 7 days rather than 5 as I am continuing with Nutrisystem and I did lose 1. I also exercise 4 times a week. If you want to try Nutrisystem, or if you're just waiting for your big box, this is a good way to get started.

Food was 3 months past expiration date. Bad deal in my opinion. Minimal breakfasts, lunches, and snacks only.

I think it was very overpriced for what I received. The food is terrible. I couldn't make myself eat it after the 2nd day. Food tasted bland but not as bad as I feared. The real problem was the development of painful gas and bloating from all the fiber.

I thought I would explode. Alka-seltzer provided only temporary relief. Had to stop eating it to rectify the problem. I lost weight while sticking to the diet but my waist actually gained inches from the bloating.

I like the convenience of having meals prepared, and am having a slow steady weight loss every week. See all 85 reviews. See all customer images. Most recent customer reviews. Published 25 days ago. Published 2 months ago. Published 3 months ago. You can add things here and there for Published 4 months ago. Unfortunately this program did nothing Published 5 months ago. Customers who viewed this item also viewed. Pages with related products. See and discover other items: There's a problem loading this menu right now.

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Typical Fasting Weight Loss Plans