A liquid diet(Juice Fast) incorporates either partial meal replacement. Most liquid diets may not be suitable for long-term or excessive weight loss (generally only fluid is lost – not fat).

A liquid diet consists of juices replacing every meal. Nutritionally this will provide virtually no protein or fat, and few calories. Vegetable and fruit juices will be rich in vitamins and minerals.

A Juice Fast should not be used as a weight loss technique. It is better to eat the fruit and vegetables. It may be beneficial to include vegetable and fruit juices in your diet – but not as a complete replacement of solid food. Many people use a tonic or juice supplement in their diet to provide essential vitamins and minerals.

Meal Replacement Products are a general term describing products that have a full range of nutrients in them. Most of these are in powder form and when mixed with water or milk provide a liquid-based meal.

Most physicians do not recommend a liquid diet unless an individual is to undergo certain procedures: colonoscopy and sigmoidoscopy. A clear liquid diet serves many functions: It can flush the bowels while decreasing strain on the digestive system.

Coffee, tea, juices, sports drinks are allowed. Before beginning this type of liquid diet, a physician will provide a detailed fact sheet on how to proceed and for how long. Individuals who undergo may be required to follow a fluid-only diet for up to ten days following the procedure.

In some cases, extreme obesity is treated with an all-liquid diet. This can be successful initially, but must be monitored by a physician for any negative side-effects.

A liquid diet may not provide the needed nutrients to maintain adequate energy levels in most individuals and short-term weight loss can be achieved, but when liquids such as protein shakes are eventually eliminated from the diet, pounds tend to be regained. Those who embark on a juice fast may find it less than satisfactory.
The replacement of food with fluids, simply will not be practical in the long term for those who need to lose only a minimal amount of weight.
Some individuals believe that fluids will cleanse the system of impurities, including those that have built up in the liver. These beliefs are generally refuted, with the caveat that the elimination of most processed foods is always beneficial. Nutrition and resistance to disease will suffer in the effort to achieve a more defined physique. Incorporating a liquid meal replacement can be an acceptable way to reduce a limited amount of weight, but should be used in conjunction with regular meals.