
A liquid diet is a short-term diet that consists of consuming only liquids and foods that turn to liquid at room temperature, such as ice cream. It is often prescribed for those with chewing or swallowing difficulties, or as a temporary diet after certain medical procedures. A liquid diet can be challenging to maintain due to its restricted nature and potential monotony. To ensure adequate nutrition, it is important to consume enough calories, protein, and carbohydrates. This can be achieved through liquid meal replacement drinks, milk, soup, and nutritional supplements. However, it may be inadequate in certain vitamins and minerals, so vitamin supplements may be necessary. Before starting a liquid diet, it is essential to consult a healthcare professional for guidance and monitoring.
What to buy for a liquid diet:
| Characteristics | Values |
|---|---|
| Calories | 1,350 to 1,500 per day for adults |
| Protein | 45 grams per day for adults |
| Carbohydrates | 225 to 325 grams per day for adults |
| Vitamins and Minerals | May be inadequate in vitamin B12, vitamin A, thiamin, and iron; consult a healthcare professional about supplements |
| Fiber | Inadequate; may need supplements if on the diet for an extended period |
| Foods to Include | Milk, water, salad dressings, mayonnaise, soup, hot cereal, juice, ice cream, butter, custard, pudding, yogurt, vegetable and tomato juice, popsicles, clear juice without pulp, plain gelatin, ice chips, sweetened tea or coffee (no creamer), clear broths, carbonated beverages, flavored water, strained cream soups, milkshakes, pasteurized eggnog, frozen yogurt, and liquid nutritional supplements |
| Foods to Avoid | Cheese, fruit, meat, cereals not on your "OK" list, raw or cooked vegetables, ice cream or frozen desserts with solids, acidic fruit and vegetable juices if you've had stomach surgery |
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What You'll Learn

Dairy products
Yogurt is another excellent choice for a liquid diet. It provides a good source of protein and can be used as a base for both sweet and savoury dishes. Regular yogurt tends to be used for sweeter options, while Greek yogurt is more commonly used for savoury recipes.
Butter and margarine are also approved dairy products for a liquid diet. They can be used to add extra calories and fat to your meals. These products are particularly useful if you are struggling to consume enough calories on a liquid diet.
It is important to note that some dairy products, such as cheese, are not recommended for a liquid diet. This is because they are not easily digestible and may cause issues for those with swallowing difficulties.
If you are considering a liquid diet, it is always best to consult with your healthcare provider or a registered dietitian. They can provide guidance on which specific dairy products are suitable for your individual needs and ensure that your nutritional requirements are met.
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Liquid meal replacements
A liquid diet is made up of fluids and foods that are normally liquid or turn to liquid at room temperature, like ice cream. It can also include foods that melt at body temperature. A liquid diet is often recommended after stomach surgery or for those with swallowing difficulties. It is important to note that a liquid diet can be inadequate in fibre and certain vitamins, and it is not suitable for long-term use unless advised by a healthcare professional.
There are various liquid meal replacement options available, including:
- SlimFast offers a range of meal replacement shakes and powders in chocolate and vanilla flavours. Their products are gluten-free and contain vitamins and minerals.
- Soylent provides ready-to-drink meal replacement shakes that are gluten-free and plant-based. Their shakes contain soy protein and 20% of your daily vitamins and minerals.
- Kate Farms offers organic nutrition shakes in chocolate and vanilla flavours. Their shakes are vegan, gluten-free, and contain 16-20g of protein and 27 vitamins and minerals.
- Garden of Life produces a vegan, raw, organic protein powder with plant-based protein, sprouts, greens, and probiotics. It is dairy-free and comes in chocolate flavour.
- Huel offers a ready-to-drink meal replacement shake that is plant-based and contains 22g of protein, 27 essential vitamins and minerals, carbs, healthy fats, and fibre.
These meal replacements can be easily purchased online or from specialty health stores. It is always recommended to consult with a healthcare professional or dietitian before starting a liquid diet to ensure it is safe and suitable for your individual needs.
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Fruit and vegetable juices
If you've had stomach surgery, it is recommended to avoid acidic juices, such as orange juice, as they may cause burning. Instead, go for apple juice or other non-acidic fruit and vegetable juices. You can also ask your healthcare professional about liquid vitamin C supplements if you are concerned about your vitamin C intake.
When choosing fruit and vegetable juices, look for those that are pulp-free and do not contain any solid pieces. You can also make your own juices at home by blending or juicing fresh fruits and vegetables and straining the mixture to remove any solid pieces.
It is important to monitor your calorie intake on a liquid diet, as it can be difficult to consume enough calories solely from liquids. Fruit and vegetable juices can be a good source of calories, but you may also want to consider adding high-calorie ingredients such as milk, honey (avoiding this for children under 1 year of age), or nutritional supplements to your juices.
Finally, a liquid diet may not be suitable for the long term as it can be inadequate in fiber and certain vitamins. It is important to consult with a healthcare professional or dietitian to ensure that your nutritional needs are being met and to determine if a liquid diet is right for you.
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Nutritional supplements
Supplements can help to ensure you are getting enough nutrition without placing stress on your digestive tract. It is important to be closely monitored by a healthcare provider when on a liquid diet for more than a few days, and they can advise on suitable supplements.
If you are experiencing frequent loose stools, this may be due to the lack of solid food in your diet. Your healthcare provider may recommend an over-the-counter fibre supplement, such as Metamucil, to relieve constipation.
High-calorie protein shakes, such as Ensure and Glucerna, can help you to consume enough calories and protein. These should not be used as the sole source of nutrition, but can be a good boost to meet your daily needs.
If you are concerned about your vitamin C consumption, ask your healthcare professional about liquid vitamin C supplements.
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Savoury options
A liquid diet can be challenging, but there are plenty of savoury options to keep things interesting and ensure you get adequate nutrition. Firstly, it is important to note that a liquid diet should only be followed for a short period, usually a few days to two weeks. If you need to be on a liquid diet for longer, consult a healthcare professional or dietitian for guidance and monitoring.
Soups
Soups are a staple of a liquid diet and can be made savoury and satisfying. Try blending avocado with cooked vegetables, broth, cream, herbs, and spices. You can also add dairy, olive oil, or coconut milk to soups to make them more filling. Beans are an excellent option, as they are high in fibre and blend easily into creamy soups. Try recipes like cream of tomato, Mexican lime, Spanish gazpacho, or pureed white bean. For a thinner soup, blend hummus with tomato juice or broth.
Dairy and Non-Dairy Options
Regular dairy products like milk, yoghurt, and cream are excellent sources of protein and fat, which can help you feel full. Add them to soups or blend them into smoothies. Greek yoghurt, in particular, can be a good base for savoury recipes. If you cannot consume dairy, try milk substitutes like soy, nut, rice, or coconut milk.
Protein Sources
Protein is essential on a liquid diet to ensure you get adequate nutrition. Try blending in nut butters like peanut, almond, cashew, or walnut butter into soups or smoothies. These provide healthy fats and protein, keeping you fuller for longer. You can also use flavourless or unflavoured protein powders in soups or smoothies.
Savoury Blends
Get creative with savoury blends by using cooked vegetables, herbs, and spices. You can also add in healthy fats like avocado or olive oil to make savoury purees or blends. Seasonings like cumin, ginger, and mint can add flavour to vegetable or fruit purees.
Remember to consult with your healthcare provider or a registered dietitian to ensure your liquid diet meets your nutritional needs and is safe for your specific circumstances.
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Frequently asked questions
A liquid diet is made up of fluids and foods that are normally liquid or turn to liquid at room temperature, like ice cream. It is usually prescribed for a short period of time, from a few days to two weeks.
Foods and liquids allowed on a liquid diet include popsicles, clear juices without pulp, plain gelatin, ice chips, water, tea, coffee, clear broths, carbonated beverages, milk and milk products, vegetable and tomato juice, strained cream soups, puddings, and nutritional supplements.
You should avoid solid foods, including cheese, fresh, frozen, or canned fruit, meat, cereals, raw or cooked vegetables, and frozen desserts with solids in them, like nuts, chocolate chips, or cookie pieces. If you've had stomach surgery, you should also avoid acidic fruit and vegetable juices.
A liquid diet may be inadequate in fiber, vitamins, and minerals, so it's important to monitor your intake. Try to consume 1,350 to 1,500 calories and 45 grams of protein per day. Keep a food diary and use a nutrition app to calculate your daily intake. If you need to be on a liquid diet for an extended period, consult a dietitian to ensure you're meeting your nutritional needs.







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