
A full liquid diet is a temporary measure that consists of liquids and foods that turn to liquid at room or body temperature. It is often recommended by doctors to patients who are preparing for or recovering from a medical procedure, or who have trouble swallowing or chewing. This diet is nutritionally adequate and offers more flavour and nutritional value than a clear liquid diet. However, it can be challenging to get enough nutrients, especially when followed long-term.
| Characteristics | Values |
|---|---|
| Purpose | Preparing for or healing after a procedure, especially dental surgery; can also be used for weight loss |
| Duration | Short-term; typically 5 days to 2 weeks |
| Nutritional value | May be inadequate in vitamins (vitamin B12, vitamin A, thiamin), minerals (iron) and fiber |
| Foods included | All liquids, including water, tea, broth, milk, juice, smoothies, shakes, and soups; foods that turn to liquid at room temperature, such as ice cream; soft foods that can be thinned with water, milk, or butter, such as cooked cereals, pasta, rice, and potatoes |
| Foods excluded | Solid foods; foods with chunks, such as nuts, candy, or pulp |
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What You'll Learn

Foods that are liquid or turn liquid at room temperature
A full liquid diet is made up of fluids and foods that are normally liquid or turn to liquid at room temperature. It is similar to a clear liquid diet but includes more flavours and greater nutritional value. It is usually recommended as a short-term strategy before or after a medical procedure or for those with swallowing and chewing problems.
- Milk and alternatives: Milk and non-dairy milk alternatives are approved for a full liquid diet. These can be consumed by the glass or added to smoothies, shakes, coffee, or tea.
- Yogurt: Regular yogurt can be used as a base for sweeter-tasting liquid meals, while Greek yogurt can be used for savoury recipes.
- Broths: Clear broths are allowed on a full liquid diet.
- Juices: All fruit or vegetable juices are allowed, but pulp should be avoided unless approved by a doctor.
- Ice cream and frozen desserts: Ice cream, frozen yogurt, and ice pops are approved as long as they do not contain nuts, candy, or other hard pieces.
- Puddings and custards: These can be thinned to a liquid consistency with milk. Sugar-free options are also available.
- Hot cereals: Cooked cereals like farina or rice can be thinned with water or milk and then strained.
- Soups: Strained cream soups are allowed.
It is important to note that a full liquid diet may not provide adequate nutrition, especially for long-term use. It can be challenging to get enough protein, vitamins, and minerals. Therefore, it is important to prioritise nutrient-dense foods and consult a doctor or dietitian for specific menu options and food ideas. Nutritional supplements may be necessary to prevent nutritional deficits.
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Nutritional value and supplements
A full liquid diet is usually a temporary measure and not a long-term nutritional strategy. It is often recommended by doctors for patients who have recently undergone surgery or are facing other medical issues that make eating solid foods dangerous. It is also sometimes used for weight loss, although doctors do not recommend this.
Full liquid diets are more nutritionally diverse than clear liquid diets, but it can still be challenging to get enough nutrients, especially if the diet is followed for longer than a few days. In this case, it is important to prioritise nutrient-dense foods and supplements. A well-planned full liquid diet is adequate in calories, protein and fat but may be inadequate in vitamins (vitamin B12, vitamin A and thiamin), minerals (iron) and fibre.
To increase your caloric intake, incorporate full-fat dairy, such as butter or whole milk, or high-calorie supplement shakes. You can also add butter or margarine to your meals to add calories and fat. To add protein to your diet, try protein shakes and powders, non-fat dry milk, instant breakfast powders, and powdered egg whites. Check with your healthcare provider if you can include cooked eggs or meat pureed to a liquid or baby food consistency. Nut butter is another good option, providing a good source of healthy fats and protein.
Liquid multivitamins are a good option if you are worried about getting full nutrition on this diet. You can also supplement your diet with nutritional shakes. Ask your doctor to provide a detailed list of exactly which foods you should eat and which you should avoid.
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Clear liquid diet vs full liquid diet
A clear liquid diet is not nutritionally adequate and should only be followed for a short period to help control symptoms from cancer treatment side effects. Clear liquids are easy to see through and pour. They include popsicles, clear juice without pulp, plain gelatin, ice chips, water, sweetened tea or coffee without creamer, clear broths, carbonated beverages, and flavored water.
A full liquid diet is made up of fluids and foods that are normally liquid or turn liquid at room temperature, like ice cream. It includes all the foods allowed on a clear liquid diet, with the addition of milk and small amounts of fiber. A full liquid diet may be used as a short-term transition step between a clear liquid and soft diet following gastrointestinal surgery or procedures. It is adequate in calories, protein, and fat but may be low in vitamins, minerals, and fiber. Other foods and liquids on the full liquid diet include thin hot cereal or gruel, strained cream soups, juices (including nectars), milkshakes, custard, puddings, and liquid nutritional supplements.
You may need to be on a full liquid diet before a medical test, procedure, or surgery, or for a while after surgery on your stomach or intestine. It is important to follow this diet exactly to avoid problems with your procedure or surgery or your test results. A full liquid diet may also be appropriate if you are having trouble swallowing or chewing.
Some liquids are considered both clear and full. If you are experiencing symptoms that will not allow you to consume anything more than clear liquids, talk to your physician or registered dietitian for recommendations.
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How long to be on a full liquid diet
A full liquid diet is typically followed for a short period of time, ranging from a few days to two weeks. It is usually recommended by a medical professional in preparation for or recovery from a medical procedure or surgery, particularly when dealing with the gastrointestinal tract or issues with chewing and swallowing.
The diet is prescribed to reduce stress on the digestive system, allowing for healing and reducing the risk of complications. However, due to its restrictive nature, it can lead to rapid weight loss and potential nutritional deficiencies if not properly managed. Therefore, it is important to be closely monitored by a healthcare provider, especially if the diet extends beyond a few days.
In some cases, a full liquid diet may be recommended for longer periods. For instance, individuals preparing for weight loss surgery, recovering from a fractured jaw, or managing chronic conditions like Crohn's disease may require a more extended period on the diet. During this time, it is crucial to work with a registered dietitian to ensure adequate nutrition and address any specific medical needs.
The duration of the diet is determined by the individual's medical condition, healing process, and overall health. It is important to follow the recommendations of your healthcare provider and consult with them regarding any concerns or complications that may arise during this time. Nutritional supplements and specific menus are important topics to discuss with your doctor or dietitian to ensure a well-rounded and safe full liquid diet.
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When a full liquid diet is recommended
A full liquid diet is recommended when a person is unable to eat solid foods, either due to a medical condition or as a result of surgery. It is also sometimes used as a weight-loss strategy, although this is not recommended by doctors.
A full liquid diet is often suggested following dental surgery, or if a person is having trouble swallowing or chewing. It may also be recommended before certain kinds of surgery or medical tests, such as a colonoscopy. For example, a person recovering from mild acute pancreatitis may follow a full liquid diet for 10–14 days, according to a 2012 analysis.
Full liquid diets are usually a short-term strategy, lasting from five days to two weeks. They are not intended as a long-term nutritional plan. This is because it can be challenging to get enough nutrients on a full liquid diet, and people may need to take supplements to prevent nutritional deficits. Doctors can advise on which supplements to take and which foods to eat to ensure a person's nutritional needs are met.
A full liquid diet includes all foods that are liquid or will turn to liquid at room or body temperature. This includes milk and milk alternatives, vegetable juice, artificially sweetened yogurt, strained cream soups, cream cereals, and sugar-free puddings. Clear liquids, such as water, tea, and broth, are also included in a full liquid diet. To increase caloric intake, people can incorporate full-fat dairy, such as butter or whole milk, or high-calorie supplement shakes.
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Frequently asked questions
A full liquid diet consists of liquids and foods that are normally liquid or turn to liquid at room or body temperature.
Foods included in a full liquid diet are milk and milk alternatives, vegetable juice, artificially sweetened yogurt, strained cream soups, cream cereals, sugar-free puddings, and ice cream.
A full liquid diet is usually recommended for people who have had recent surgery, particularly on their stomach or intestine, or who have trouble swallowing or chewing. It is also used for people who are trying to lose weight.
A full liquid diet is usually a short-term measure, ranging from 5 days to 2 weeks.











































