Before you start on any diet you should always consult your doctor first.
Sometimes a fad diet can be dangerous and cause more damage than it can help you.
Some of the diets that have you cut carbohydrates completely out of your diet can do some serious damage to your internal systems and organs and that is why many doctors recommend that you do not get involved in a diet like that.
Some people decide that they are going to lose weight the old fashioned way and just stop eating but fasting to lose weight can be even more dangerous than any fad diet and while you may see results after starving yourself the damage you are doing is sure to come back on you later.
Your body needs certain nutrients every day in order to operate properly and depriving your body of those essential nutrients can begin to cause physical damage.
You will find that your various systems such as your circulatory and nervous systems become affected and if you allow your body to go without essential nutrients for too long then it can start to cause your internal organs to shut down.
That kind of damage can be fatal so if you intend upon fasting to lose weight you may want to consult your doctor prior to beginning any drastic program such as that.
If you do intend upon fasting to lose weight then you will need to monitor what you do take into your body to be certain your body is getting the fuel it needs to survive.
Once again this should be something you do in consultation with your doctor but as an example you will want to drink as many fluids with proteins and other important nutrients in it to keep your levels healthy.
Your digestive system may suffer from a lack of solid food so allow yourself some sort of solid food during the course of your diet to allow your digestive system to continue working.
There are healthy alternatives to fasting.
Work with your doctor or a certified nutritionist to find out which foods your body needs and at what levels so that you are not taking in more than you need.
You run into problems when you take in more fuel than you need and the body starts turning that excess into fat.
If you keep your metabolism high and regulate what kinds of foods you eat and how much of them you eat then you should be able to lose weight in a healthy manner.