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A liquid diet usually helps provide sufficient hydration, helps maintain electrolyte balance, and is often prescribed for people when solid food diets are not recommended, such as for people who suffer with gastrointestinal illness or damage, or before or after certain types of medical tests or surgeries involving the mouth or the digestive tract.
A fluid-restrictive diet assists in preventing the build-up of fluids in the body. Reducing fluid intake can alleviate stress on the body and may reduce additional complications. A fluid restriction diet is generally medically advised for patients with "heart problems, renal disease, liver damage including cirrhosis , endocrine and adrenal ...
Elemental diet: A medical, liquid-only diet, in which liquid nutrients are consumed for ease of ingestion. [48] Elimination diet: A method of identifying foods which cause a person adverse effects, by process of elimination. [49] Gluten-free diet: A diet which avoids the protein gluten, which is found in barley, rye and wheat.
In 1978, 58 people died in the United States after following very-low-calorie liquid protein diets. [32] Following this event, the FDA requires since 1984 that protein VLCDs providing fewer than 400 calories a day carry a warning that they can cause serious illness and need to be followed under medical supervision. [ 32 ]
The "liquid protein" PSMF diet described in the book The Last Chance Diet in 1976, [11] motivates that the liquid protein diets of varying composition became widely popular. Three years later, in 1979, Isner published a report of 17 deaths associated with liquid protein VLCD, due to heart-related causes. [12]
The volume of liquid is less important than the type of liquid ingested. [4] Non-emergency surgical cases should be delayed for NPO status. When nothing by mouth or a liquid-only diet is indicated for an extended period, enteral feeding or total parenteral nutrition may be recommended.
Meal replacements often come in liquid form, but there also are meals and powdered drinks such as Soylent. A meal replacement is a drink, bar, soup, etc. intended as a substitute for a solid food, usually with controlled quantities of calories and nutrients.
Such diets are often less palatable, and a reduction in food intake is common. Also, puréed diets are often poorer in calories, protein, and micronutrients than regular diets. [3] Most of the foods on this diet can be both puréed and thinned with liquids to be incorporated into a full-liquid diet.