Hi, fasting can be a wonderful experience, but you have to be in very good health and it has to happen during a time of rest, when not too much is happening in your life. I have done several fasts and have always come out refreshed and happy, especially when using fresh organic juices, which are extremely nutritious. It helps to flush your system and clear you mind.
However, even though fasting is wonderful for detoxing, it is a rather poor weight loss tool. Half of the weight you lose when fasting, you'll put back on. Also, it is important that a longer fast, eg. longer than a week, be supervised by a health professional, or nutritionist.
As Dee said, I have found for myself that when I deprive myself of food (eg. only eat once/twice day) I can't loose weight at all. For myself, I realised that grazing on lots of healthy fruit and raw vegetables is the best way to loose weight, plus one or two meals containing protein during the day. (Unfortunately I have been grazing on all the wrong things lately, hence my weight loss quest)
Which weight loss approach have you decided to take now?