In the short term yes, but I AM NOT suggesting this as an easy fix to reduce your weight, its very unhealthy and you will most definitely regain any weight lost plus more.
If you drastically cut your calories, you will slow down your metabolic rate, your body will realise this and it will think 'famine' is on the way. Anything you do start to eat will be stored in your 'fat banks'. Fat is very precious to your body and it will not give it up easily, long periods of fasting or periods of not eating will send your body into a catabolic state which means it may start to feed from muscle while it is conserving your fat stores. In some cases this approach may lead on to, yo-yo dieting, binge eating and/or eating disorders.
The body needs a certain amount of energy for its daily activities. If more energy is consumed than the body requires for its basic functions and additional activities then weight will be gained. Therefore to achieve weight loss we need to expend more calories out than what we take in. We have to cause an energy deficit or a positive energy balance. This is a greater calorie output over calorie input.
In order to lose 1lb (0.5kg) each week a deficit of 3,500 calories is required, that is 500kcals per day. The best way of achieving this is by reducing the amount of energy eaten or by using up more energy through physical exercise or activity. Ideally a combination of both, i.e reduce the amount of calories consumed and do more exercise - simple!
This is proven the most effective way to lose weight and maintain weight loss.
Read more on the dangers of starvation, The Body Neglected nervosa link.
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