Full liquid diet - Foods and How it works


Full liquid diet

Full liquid diet

A full liquid diet consists solely of fluids and foods that are normally liquid, as well as foods that turn to liquid at room temperature, such as ice cream. It also contains:

  • Soups with strained cream
  • Tea, Juice, Jell-O Milkshakes, Pudding, and Popsicles

When you're on a liquid diet, you can't eat solid foods.  

Most people will only need to follow a full liquid diet for a few days to two weeks.


Why You May Need Full Liquid Diet

Before a medical test or procedure, or before certain types of surgery, you may need to follow a strict liquid diet. It is critical to strictly adhere to the diet in order to avoid complications with your procedure, surgery, or test results.

You may also need to follow a strict liquid diet for a short period of time after having surgery on your stomach or intestine.

You may also need to follow this diet if you have difficulty swallowing or chewing. If you are prescribed this diet for dysphagia (swallowing issues), your speech pathologist will provide you with more detailed instructions. The full liquid diet is sometimes used as a transition from a clear liquid diet to your regular diet. 

How a full liquid diet works

On a full liquid diet, you can eat foods that are liquid or turn liquid at room temperature, as previously stated. Because these foods contain little to no fibre or protein, they provide a break for your digestive system.

On a full liquid diet, you may need to eat more than the three standard meals per day to get all of your calories and nutrients.Eat six to eight times a day, with a variety of liquids and strained or blended foods. Incorporate full-fat dairy, such as butter or whole milk, or high-calorie supplement shakes to increase your caloric intake.

If you're concerned about getting enough nutrition on this diet, a liquid multivitamin is another good option. 

Only liquids are permitted to be consumed.

You may consume the following foods and beverages:

  • Water
  • Fruit juices, including nectars and pulp juices
  • Margarine, butter, oil, cream, custard, and pudding
  • Sherbet, frozen yoghurt, and plain ice cream
  • Popsicles and fruit ices
  • Syrups, honey, and sugar
  • Soup broth (no solids, but bouillon, consomm√©, and strained cream soups)
  • Ginger ale and Sprite Gelatin are two examples of sodas (Jell-O)
  • Liquid supplements such as Boost, Ensure, Resource, and others
  • Coffee or tea with cream or milk, sugar, or honey 

Consult your doctor or a dietitian to see if you can include the following foods in your full liquid diet:

  • cereals that have been cooked and refined, such as cream of rice, oatmeal, grits, or farina (Cream of Wheat)
  • Meats that have been strained, such as those found in baby food

  • Soup with pureed potatoes 

Breakfast could be on the menu for the day.

Breakfast snack

  • 1/2 cup supplement drink, such as Boost or Ensure
  • 1/2 cup yoghurt (custard-style)


  • 2 quarts soup
  • a half-cup tomato juice
  • 1 cup pudding, chocolate  


Snack for the afternoon

  • 12 cup beverage supplement
  • 1 cup of fruit juice


  • 2 quarts soup
  • 1/2 to 1 cup milk-thinned blended oatmeal
  • half a cup lemonade

Snack in the evening

  • 1 cup beverage supplement
  • a half-cup vanilla ice cream  

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Foods to avoid while on a liquid diet

On a full liquid diet, you should avoid any solid foods. This means avoiding raw, cooked, or canned fruits and vegetables with skins or seeds.

Other foods to avoid are:

❌ Mashed fruits and vegetables, such as avocado mashed nuts and seeds

❌ Cheeses, both hard and soft

❌ Soups containing noodles, rice, or other chunks ice cream containing solids

❌ Bread, cereals, and other whole grains

❌ Meats as well as meat substitutes

❌ Sparkling water and soda are examples of carbonated beverages. 


People who have had stomach surgery should avoid drinking orange juice and other acidic fruit and vegetable juices. These juices have the potential to cause burning.

If you're worried about your vitamin C intake, talk to your doctor about taking liquid vitamin C supplements.

Based on the procedure, your doctor may give you additional dietary instructions. 


What foods to eat ?

In comparison to a clear liquid diet, a full liquid diet allows you to eat a wider variety of foods.

Vegetables and fruits

✅ All fruit and vegetable juices (avoid pulp unless your doctor says otherwise)


✅ Clear broths with bouillon (beef, chicken, vegetable)

✅ Vegetable soup, strained and pureed

✅ Soups with strained meat or cream (may contain pureed veggies or meat)


✅ Cow's milk in all varieties (whole, low-fat, reduced fat, fat-free)

✅ Lactose-free milk alternatives include soy, almond, and flax milk.

✅ Butter (half-and-half)

✅ Cream of tartar

✅ Yogurts in the form of custard


✅ Creamed Wheat

✅ Cream of Rice Grits and other cooked cereals made from refined grains that have been thinned with milk 



✅ Margarine mayonnaise creamy peanut butter or other nut butter of choice


✅ Tea and coffee

✅ Cocoa infusion

✅ Fruit drinks with artificial flavours

✅ Lemonade sports drinks, similar to Gatorade milkshakes (you may add smooth peanut butter or canned fruit, but blend until smooth)

✅ Eggnog has been pasteurised

Beverages to supplement

✅ Glucerna Ensure Boost Carnation Instant Breakfast


✅ Pudding, custard, gelatin, and ice cream (plain varieties)

✅ Fruit ices sherbet popsicles 

Things to think about before embarking on a full liquid diet

Your doctor is the best source of information about what foods you should and should not eat while on a full liquid diet. You could also consult a registered dietitian.

A registered dietician can assist you in planning your meals within the parameters of a full liquid diet and tailoring it to your specific requirements.

Some people, for example, may require a special diet if they have diabetes. Others who have had bariatric surgery may need to avoid or limit certain foods, such as sugar, on the full liquid diet for a period of time.

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