What happens when you go on a very low calorie diet?

Tissue breakdown. Very low calorie diets puts a person in ketosis. The body does not have the proper amounts of protein, carbohydrates and fat to carry out all the functions it has to do. You will lose fat, for sure, but you will do this at the expense of losing protein, thus muscle breakdown. A very low calorie diet shold not be undertaken unless under the care of a doctor well versed in the diet and close f/u.
Many things. A very low calorie is defined as less than 800 calorie a day. The first thing will be a slowing of your metabolism. Secondly, if you restrict your carbs to 40 or 50 grams a day and get enough protein you will start to use body fat (ketones) for you energy needs. Only do this under a doctors supervision, before you start.

Related Questions

Could a very low calorie diet be successful?

It can be under medi. It depends on how many colories but 800 calories diet can be successful if done under close medical supervision with vitamin supplements and regular follow ups. Read more...

I can't manage to lose anymore weight and I'm really getting worried. I'm on a very low calorie diet and workout everyday. What's wrong?

Calorie . Please have your primary doctor refer you to a nurse practitioner who will help you improve your weight and workout. You won't get things under control for a few weeks but you will be presently surprised before long. Read more...

I've been on a very low calorie diet for the past 10 days (been busy + have just forgotten food) will I put on weight if I start to eat normal again?

Maybe. You may put on a few pounds as your body restores its glycogen. Make sure when you start eating again you drink plenty of water and eat healthy. Lean protein, lots of vegetables, small amount of whole grain and 1-2 fruits. Just don't go crazy with fast food or junk food. Read more...

Will metabolism slow down on a very low calorie diet?

Yes. If your body does not get enough calories, it sends stress signals to the brain. These stress hormones try and preserve the body by decreasing energy used and in doing so slows the body's metabolism. Read more...
Most likely. On a very low calorie diet the metabolism will most likely slow down unless you're getting most of your calories from protein or very complex carbohydrates. In general weight-loss causes the metabolism to go down because the body has to run a smaller weight. If you're trying to increase your metabolism go on a little car ketogenic diet for most of your calories come from lean protein and some bastable's and a little bit of fruits as well as healthy fats like planned or fish-based fat. Read more...

Will you still lose weight on a very low calorie diet if you are not in ketosis?

Yes. The danger of low calorie diet that is not balanced can cause essential muscle loss - puts your gut and heart in danger, can cause electrolyte imbalance and danger of creating gall stones - so do with caution and inform your pcp about your goal so he or she can work with you. Read more...

Can a very low calorie diet allow you to maintain lean mass?

If moderate exercise. If one does some mild or moderate exercise, for 30-40 minutes, 3-4 times a week, she will likely stimulate his muscles enough to maintain them. On a "very low" calorie diet, she can get into trouble if the calories are too few (his body may break down muscle for fuel). Thus, "very low" calorie diets should be adjusted into "moderately low" calorie diets, which also have better long-term success. Read more...